Faqs

Life time of rubber products
What are the life times and shelf life's of the rubber covered and rubber blanket printing discs, top rollers (and rollers of extra distribution system) and packings?

Life timeShelf life
Rubber covered printing discs for conventional and UV inks2 years2 years
Rubber blanket printing discs for conventional and UV inks3-6 months1 year
Top rollers (AE/HSIU4) and rollers of extra distribution system1 year2 years
Rubber packings3-6 months1 year
Paper packings3-6 months5 years

Depending on the use these times may differ: intensive use may shorten the life time, if seldom used and storage is okay (not to central heating, in dark, room temperature and so on) the life time may be longer.
 
Shelf life and open life of inks and oils
What are the life times and the shelf life of the inks?

Life timeShelf life
IGT density ink, offset ink, fluff test ink
1 year3 years
IGT gravure ink6 months3 years
IGT Heliotest ink6 months1 year
IGT pick test oils1 year3 years
Huber inks1 year3 years
Lorilleux inks6 months1 year
Other liquids: stop out solution, IGT printing penetration liquid, IGT roughness liquid2 years3 years

The storage must be at room temperature in closed packings.
 
Recommended calibration intervals
What are the recommended service and calibration intervals for the testing equipment?

ServiceCalibration
C1/C1-5/C1-7/G1/G1-5/AE2 yearsno calibration
A1/A2/A1-3/A2-3/Orange Proofer2 years6 – 12 months
AC2/AIC2/AIC2-5/ GST’s/HSIU4/F11 year1 year
 
Training
Can we have training in Amsterdam for the right use of the equipment?
Yes. The time required for the training depends to the type of tester and accessories. In principle 1 day for a GST or AIC2-5 with HSIU4 will be enough. If the customer has more accessories 2 days training are advised . For C1, F1, G1-5 or Orange Proofer 0.5 day is standard.
 
Can IGT arrange on site training?
Yes, ask for a quotation.
 
Demo’s of IGT equipment
How about demonstrations of the testers?
IGT has fully equipped demo facilities in Amsterdam, The Netherlands and in Arlington Heights, Ill, USA. Additionally there are limited possibilities for on site demo by IGT specialists and the use of a   tester for trials for a limited time and against small costs.

Additionally IGT co-operates with a range of universities and institutes who can give demonstrations, do investigations for you test your materials on the IGT testers to show you the way it works.
 
Cleaning discs
Which cleaning solvents do I use?
For CONVENTIONAL inks:
White spirit, Cleaning naphtha, L­ighter fluid or Turpentine. Also different blanket washing agents can be used. These have the disadvantage (like turpentine) that they dissolve slower or leave a greasy cover on the rubber. In that case it is recommended to the final cleaning with white spirit.

For UV inks:
Ethyl acetate, Acetone, Methyl Ethyl Ketone (MEK), Ethanol or Spiritus can be used. Also the basic solvent in the ink itself can be used. These all have the disadvantage that they smell and evaporate rapidly so giving easily a bad atmosphere in the lab.
 
How do I clean rubber or rubber blanket printing discs and top rollers?
Yes, it can be done, however there are some precautions:
  • The rubber blanket of the disc has been sealed. That means that the sides and the seam have been lacquered so no solvent can penetrate under the blanket.
  • If you recover yourselves, the sides and the seam will not be sealed, so the solvent can penetrate under the blanket and the glue may dissolve.
  • The blanket is self adhesive. When you use a very strong glue e.g. a two-component you will have problems with cleaning the core for future replacement.
 
Can I return my rubber covered printing discs or top rollers for recovering?
Generally the cost of returning the disc or top roller and preparing it for recovering is higher than production of a new one. The cost of the disc are not so much the material cost but the cost of coating and testing and the amount of rejection because of the repeatability and reproducibility demands.
 
Can I get my printing discs and top rollers recovered from a local supplier?

Yes you can, however there are many different compounds sold under the same general name resulting in very different properties during print. This is generally not a problem in a printing press because these compounds are adapted to certain ink types and the rollers in the press make many revolutions before the first good print comes of the press. In the IGT applications the first print should be good already with any type of ink.

 

The rollers are cleaned very often in comparison to a press roller and should withstand this process over time. As the results are often compared with others, a database or with previous runs/batches the rolls must remain stable over time and each roll must be the same all over the world. This can only be guaranteed in a production process and quality assurance process as in place between IGT and its suppliers. 

 
Can I get original IGT printing discs and top rollers from a local supplier much cheaper than directly from IGT?
NO YOU CAN NOT. It has been brought to our attention that in several countries there are companies supplying IGT spare parts, printing discs, top rollers, accessories and even complete copy-cats. IGT supplies its equipment only directly to its customers or through its authorized representatives al of whom you can find on this site.

The use of these non-original IGT copied parts is highly discouraged, the parts we have received until now are not at all at the quality level which you may expect from IGT, prints are not repeatable or reproducible, but most important several of the parts, in particular accessories and spare parts, are DANGEROUS in use or will damage the tester. Note that damage created this way is not covered by warranty and that the use of some of these parts may cause much more damage than only the affected part.
 
Flexo tester F1
What is the size of the sample to be printed?
55 x 735 mm, in case the sample is not long enough stick two pieces together and make sure that the final part of the print is printed on a full sample.
 
When do I use the multi rotation mode of the F1?
The system can only be used for water based inks and UV drying inks.

WATER BASED INKS
If these inks are printed on coated paper there may be problems in the print quality in case of thick ink layers. In that case it is advised to use an anilox disc with small volume and print in the multi rotation mode, commonly 3 - 5 revolutions of the photopolymer. The advised anilox disc is 402.418 or 402.419. With non coated paper an anilox disc with larger volume can be used.

UV DRYING INKS
With these inks use the multi rotation mode and an anilox disc with low volume as 402.418 or 402.419 or use one rotation with anilox discs with low or high volume on coated and non coated papers.

SOLVENT BASED INKS
With these inks the multi rotation mode cannot be used because the ink dries very quickly in the cells. For coated and non coated paper use anilox discs with low or high volume.
 
What is the test procedure for making a print without the multi rotation mode?
The normal procedure to make a print with the F1 is:
  • Apply some ink into the nip between the doctor blade and anilox disc the printing form cylinder makes one rotation during which the anilox disc makes two revolutions. That means that the ink is transferred from the anilox disc to the photopolymer directly after its first rotation and then after its second rotation again. In the second rotation the cells are filled better than in the first rotation. So the photopolymer is inked only one time, but in general in two different ink film thicknesses after each other.
  • The ink from the photopolymer is transferred to the substrate. We get two prints after each other and in general the first print has a lower density than the second print.
 
What is the test procedure for making a print with the multi rotation mode?
The procedure to make a print with the multi rotation of the printing form cylinder is:
  • Apply some ink into the nip between blade and anilox disc
  • The printing form cylinder makes multi rotations (adjust between 1 and 20; advised 3 - 5) during which the anilox disc makes double number of revolutions. That means that the ink is transferred from the anilox disc to the photopolymer during every rotation of the photopolymer, so the photopolymer is inked several times.
  • The ink from the photopolymer is transferred to the substrate. We get two prints after each other and dependent to the combination of ink and substrate the first print can have a little lower density as the second print. Sometimes this difference can be seen and sometimes it cannot be seen.
 
How do I test mottling?
For mottle testing they have to make prints on the substrate at several printing conditions as anilox- and printing force, speed, anilox disc, multi rotations for water based inks, several viscosities. To start it is advised to make trials on paper of which the customer knows there is a problem with mottle. In this case they also have to use the ink from practice.
 
Is it possible to manufacture a custom designed ceramic anilox disc?
Yes. The price will depend on the design, the delivery time will be 3 - 5 months and the exact value of the volume is determined after production.
 
Is there a difference in the ink transfer between in copper engraved anilox discs and ceramic discs?
Yes. In general we can say that the in copper engraved anilox discs have more ink transfer than the ceramic discs at the same volume.
 
What are the cleaning agents for the anilox discs, blade and photopolymer?
WATER BASED INKS
Directly after having made the print, take off the anilox disc and clean it with water or insert it directly into water and clean it later on with lint free rags soaked into water and velvet with water. After having cleaned with water clean with lint free rags and/or velvet with ethanol.
Clean the doctor blade with lint free rags with water and/or ethanol and the photopolymer with lint free rags with ethanol.
Allow every part to dry before used again and remove the fibers on the photopolymer with self adhesive tape.

SOLVENT BASED INKS
Directly after having made the print, clean the anilox disc with lint free rags soaked into the solvent of the ink and velvet soaked into the solvent of the ink. Very often ethanol can be used.
Clean the doctor blade with lint free rags with the solvent of the ink or ethanol and the photopolymer with lint free rags with ethanol. For the photopolymer a maximum of 15 % of ethyl acetate can be added to the ethanol.

UV DRYING INKS
After having made the print, clean the anilox disc with lint free rags soaked into the solvent of the ink and velvet soaked into the solvent of the ink. Very often ethanol can be used.
Clean the doctor blade with lint free rags with the solvent of the ink or ethanol.
Clean the photopolymer with lint free rags with ethanol. For the photopolymer a maximum of 15 % of ethyl acetate can be added to the ethanol.
 
What are the best testing conditions for solvent-based inks on plastic substrates?
We had good results with the following conditions:
Printing form: photopolymer for corrugated (6.25 mm thickness)
Anilox force: 30 N (Because the substrate is very smooth it is advised to use very low anilox and printing force)
Printing force: 45 N
Printing speed: 0.3 m/s
Number of revolutions: 0 x (For solvent based inks the number of revolutions must be 0 because the ink dries very quickly)
Anilox disc: 402.225

With these settings the first trials can be made. The results have to be compared with the results of practice. Dependent to the results the testing conditions may have to be changed.
 
What are the best testing conditions for water based inks on smooth paper?
It is advised to start with the following conditions:
Anilox force: 40 N
Printing force: 60 N
Printing speed: 0.5 m/s
Number of revolutions: 4 x
Anilox disc: no standard advise, it is advised to use an anilox disc with a very low volume as e.g. 402.418 or 402.419 (2.7 cm3/m2).

With these settings the first trials can be made. The results have to be compared with the results of practice. Dependent to the results the testing conditions may have to be changed.
 
What are the best testing conditions for water based inks on rough paper?
It is advised to start with the following conditions:
Anilox force: 200 N
Printing force: 300 N
Printing speed: 0.4 m/s
Number of revolutions: 0 x
Anilox disc: no standard advise, it is advised to use an anilox disc with a rather high volume as e.g. 402.411 (12 cm3/m2)

With these settings the first trials can be made. The results have to be compared with the results of practice. Dependent to the results the testing conditions may have to be changed.
 
Is there a relation between the screen ruling of the anilox of the press and the screen ruling of the anilox disc of the F1?
This is not known as a general rule. There are so many differences between the printing press and the F1 that it is not possible to give a standard relation. For the printing press we have to realize the differences between: diameters of cylinders, type of photopolymer, anilox force, printing force, printing speed, wear of anilox, screen rulings with volumes, types of cells, types of ink, viscosities, substrates and so on.
 
Does the F1 need calibration?
Yes, calibration by IGT or customer check of calibration ca be done using the calibration menu of the tester in combination with PFM and a RPM meter. Enter corrections into the data fields in the display, no mechanical alterations are required.
 
What is the internal calibration?
Internal calibration for speed is not a calibration according to the ISO definition, it is a calibration to the internal standard of the tester which is a very accurate timer or clock frequency.
 
Gravure testers G1 and G1-5
What do we need to change a G1 into a G1-5 and can we do it ourselves?
The next articles are necessary:
433.250.000 doctor blade holder
433.257 doctor blade, set of 5     
404.001.016 substrate carrier 60 x 745 mm, standard on all G1’s starting with article nr 430.
433.084 impression cylinder                      
433.031 substrate guide                             

The customer can change these articles himself if the G1 has been delivered later than May 2001, older versions need mechanical modification.
 
Is it possible to manufacture a ceramic disc with a line pattern?
Yes, the price for the ceramic disc for the G1 will depend on the design. The delivery time of this disc is about 3 – 4 months. The final volume will be determined after production.
 
Is it possible to manufacture a chromium-plated disc without design?
Yes,  the delivery time on request. This disc cannot be engraved later.
 
Does the G1 need calibration?
Only the speed needs calibration once a year. The force is fixed and can only change in case of defect.
 
Can IGT make custom designed printing forms?
Yes, principally that is possible. Depending on the design there may be limits on the accuracy of the reached volume. The final volume will be determined after production. Delivery time between 3 and 6 months.
 
Offset tester C1, C1-5, C1-7, Cx3 or Cx4
Should the printing disc shaft move in all directions?
The printing disc holder must be wobbling, using this the printing disc positions itself.
 
What is the recommended force for a rubber blanket disc?
For a rubber blanket disc the printing force should not exceed the value of 8 N/mm width, so a maximum of no more than 300 N for the C1, 400 N for the C1-5 and 550 N for the C1-7, should be used. The too high force may cause dents in the blanket and as a result of that stripes or unevenness in the print.
 
The blanket comes loose from the disc, how can this happen?
This may be caused by the force but can also be caused by too rough cleaning practice. On the original printing disc, aluminium core, the blanket is stuck without sealing the edges, this means that there can enter solvent or ink under or in the blanket and the blanket can get loose or swell.
 
Why should I use a blanket disc?
For rougher paper types, the user can change easily the blanket himself.
 
Does the C1 need calibration?
No, no calibration required. The force is fixed and can only change in case of defect.
 
What is the film thickness on the substrate (not on the printing disc)?
The tables in the manual of the C1 give the theoretical ink film thickness at the surface of the printing disc. The amount of ink transferred to the paper is dependent to the type of paper and the type of ink.  To know exactly the amount of ink transferred to the paper you have to follow the next procedure:
  • Apply a certain amount of ink to the inking unit
  • Distribute the ink
  • Ink the printing disc
  • Weigh the inked printing disc on a laboratory scale with an accuracy of 0.1 mg or better ( = G1 g)
  • Make the print
  • Weigh the printing disc again on the laboratory scale with an accuracy of 0.1 mg or better ( = G2 g)
  • Measure the length (l cm) and the width (w cm) in cm of the print
  • Calculate the ink transfer in g/m2 with the formula:
10000 * (G1-G2)
----------------------
l * w
 
Offset tester Orange Proofer
Does the OP need calibration?
The speed is fixed and can not be changed. The force needs calibration once a year.
 
Global Standard Testers general
Why has the old velocity table of the AIC2-5 changed into the new table which is delivered nowadays? The results are not exactly the same.
The very old scale (1964-1967) with the moving indicator has been changed in the past because more accurate measuring methods enabled us to replace the empirical values.

The current scale (2000) gives again small differences when comparing to the previous scale of AIC2-5. With the development of the GST we made measurements with a more accurate method as in the past. These new figures are used in the new table of the GST. This new table can be used with the AIC2-5 as well. The speed profile itself has not changed during the years. Measurements have been conducted on testers until 32 years old.

This means that there can be a difference in the reading on the new tables in comparison those with the old table, although the pick distance is exactly the same. To prevent problems compare only results read with the same table. Both tables can be used on all instruments.
 
Can the compressor be changed from 220 V into 110 V?
No, the voltage cannot be changed. When placing the order the voltage has to be mentioned.
 
Does the GST need calibration?
Yes, Calibration by IGT or the customer checks the calibration using the service menu in the tester in combination with PFM and/or PSM. Enter corrections into the data fields in the display no mechanical alterations are required.
 
What is the pressure of the compressor?
The compressor must give a pressure of 8 bar, the pressure on the GST must be >7 bar.
I cannot change the printing force or speed.
For many tests the pressure is fixed to the standard settings, you have to go to the option menu to change the FIXED MENUS to OFF after which you can change into any setting you want, also into settings you don't want or which can damage the rubbers.
 
Do I need a sector with clamps?
The sector with clamps is a requirement for gravure because there is a rubber packing used, some other tests also need packings like damping, intaglio etc. The packing can only be mounted on a sector with clamps.
 
Which tests can be done on the GST2?
Wet on Wet
Colour / Density (conventional + intaglio inks)
Print Through
Print Smoothness
Print Mottle
Back Trap Mottle
Set-off 2 fields
Set-off 4 fields
Set-off 10 fields
With only some printing discs they can do many more test.
They need accessories for:
Wet pick
Intaglio at high temperature
Fluff test
Water Mottle
Heliotest
Flexo
Gravure

 
How is intaglio done on the GST2?
There two types of test which can be done for intaglio:
  • Ink a disc on the HSIU4 at a temperature of 40 Celsius and make a normal print in the GST2. This is no problem at all. No special settings, this can be done using the standard menu (settings) for colour or density measurements.
  • There is another type of test which uses a special accessory. This test is to show the effect of the very thick but narrow ink lines of 30, 60 or 120 micron thickness at 3 mm width. This test is done at 80 Celsius for which the accessory has to be placed in a stove, the ink is applied and distributed like with Westvaco pick testing after which the disc is placed on the tester and printed.
Both can be done on the GST2
 
AIC2-5
Can the pick test results of the AIC2-5 be compared with the A1-version?
No, it is not possible to compare the results of the A1 with those of the AIC2-5. The speed curve of both the instruments is not the same. This means that the speed at a certain point of the strip of the A1 is not the same as at the same point of the strip on the AIC2-5. Although you have to use the speed table from which you read the speed, this difference has an influence on the speed at the certain point of the strip. The speed curve of the A1 is a parabolic one; the speed curve of the AIC2-5 is a straight line (the curve is in the graph speed vs. distance).

To make a correlation between both instruments you have to make comparative trials on both instruments. You may have to make the correlation for every type of paper.
 
What are the voltage settings?
Factory setting set to 380V/50Hz, 3 phases, ground, may be used also for 60Hz, do not use the 0 (neutral). User can change it into 415/440 or 440V.

The new version AIC2-5, series AA, is supplied with 110/220 V, single phase power supply!
 
How to change the voltage setting?
This should be done by an authorized electrician!
  • Disconnect the power plug from the wall socket!!!!
  • Place the unit on its back.
  • Remove the bottom plate (4 screws)
  • The transformer is situated on the left side
  • There is a green-white wire connected to position 2 of the connector block on the transformer (380V), remove this wire from point 2 and place it on point 3 for 415V, on 4 for 440V and on 5 for 480V
  • Replace bottom plate
NB.: Change the information on the voltage indicator plate at the left hand side of the machine, fuses remain the same. On the new version change the setting on voltage selector next to the mains entry.
 
The lamp of the start position of the sector lights in the wrong sector position.
Positioning the sector of an AIC2-5 if 180 degrees wrong.
  • Turn the sector in the position which makes the start lamp light, this is the internal, official start position. The sector is in a wrong position for printing, the front packing clamp is pointing toward the red lamp.
  • Move the speed control switch, constant-accelerating, in the middle of the sector into constant speed position.
  • Move the switch now a little bit into the direction of accelerating speed, so far that one can turn the sector free (this is around the middle between constant and accelerating speed position): the sector is no more connected to the main shaft and turns very light.
  • Turn the sector now in its correct position, this is the position to start a print, and try to slide the switch into constant or accelerating position. This can give some problems, there is only a very specific position in which this will be possible. The best way is to position the sector in its right position; then push the slide smoothly into constant speed position, then turn the sector slowly few degrees in either direction, at a certain moment the slide will move into its correct posi­tion.
 
How can we adjust the brake/clutch?
Depending on the serial number of the tester there are different types of clutches and brakes used.
Contact IGT to check if and how yours can be adjusted.
 
Does the AIC2-5 need calibration?
Yes, printing force and printing speed have to be calibrated once a year.
Calibration by IGT or customer using PFM and/or PSM to check the calibration state, corrections by mechanical means in the tester.
 
New generation AIC2-5
What are the differences between the old and the new version?
The most important changes are:
  • 110/220V single phase power supply.
  • Change to Global Standard Tester printing disc shafts, so old discs do not fit on new testers. New discs will fit on the old version using an adapter.
  • Speed setting is now computer controlled, no more switching over from low to high speed.
  • No mistakes possible in combination with timer and switch over from constant to increasing speed.
 
What are the voltage settings?
The new version AIC2-5, from July 2002, series AA, is supplied with 115/230 V, single phase power supply!
 
How to change the voltage setting?
Change the setting on the voltage selector next to the mains entry.
 
Why has the diameter of the shaft for the printing discs changed?
There are two reasons to change the diameter: reduce the weight of the discs so all discs used for colour printing or matching can be weighed on a laboratory balance, these are now all under 200 g, while most of the discs are less than 160 g. The other reason is to get a better alignment of the disc to the sector.
 
How can I fit the new discs on the old AIC2-5?
Use the adapter 466.052.001 on the AIC2-5 and the High Speed Inking Unit 4, use the 466.052.002 on the AE inking unit (these are heavier to compensate for the lower weight of the disc).
 
Inking unit AE
How to change the oscillator main shaft and drums?
To prevent damage to the drums and to guarantee a good roundness of the positioning of the oscillator and the drums after remounting it is strongly recommended to have this done by IGT.
 
What is the voltage of the tester?
Factory setting set to 230V or 115V 50/60Hz, single phase. To change the voltage the wiring of the tester has to be changed by an authorized electrician.
 
High Speed Inking Unit 4
Is it necessary to use a water bath?
Yes. Because the inking speed of the HSIU4 is high and the cylinders are small so many ink splittings are made, there will be a temperature increase. With a water bath this temperature increase will be eliminated.
 
What are the minimum requirements for a water bath?
Connections for tube with diameter of 8 mm
Pumping capacity: min 3 l/min
Temperature adjustment: 0.1˚C, accuracy ± 0.1˚C
Volume: min 3 l
Pumping height: 3 m (= 0.3 bar)

Cooling capacity:
25 to 20˚ C -> 200 Watt advised
25 to 15˚ C -> 175 Watt advised

Range: 15˚ C to + 45˚ C

We have good experience with:
  • Haake DC10-K10 Delivered in the Netherlands by: Wilten & Partners, Hekven 1, 4824 AD Breda, The Netherlands, tel. +31 (0) 76 541 0410  fax +31 (0) 76 541 4867    Manufacturer: Gebr. Haake, Dieselstrasse 4, D-76227 Karlsruhe, Germany, tel +49 (0) 721 4094-0  fax +49 (0)721 4094 300  e-mail: info@haake.de ,internet: www.haake.de                                                                                                       
  • Tamson TLC-3 Delivered in the Netherlands by: Fisher Scientific, PO Box 3095,   5203 DB  ‘s Hertogenbosch, The Netherlands  tel. +31 (0)73 690 3690, fax +31 (0)73 690 3695
  • Lauda Delivered in the Netherlands by: Beun de Ronde, Bovenkamp 9, 1391 LA Abcoude, The Netherlands, tel. +31 (0)294 283 119, fax +31 (0)294 284 557
 
What is the difference between the bath with and without internal cooling?
We offer two solutions for the water bath:

A one type bath with internal cooling, this has a refrigerator in the bath housing itself.
B one type of bath without the refrigerator but with a heat exchanger.

Type A is completely independent, you just put the correct volume (about 3 litres) of water in the reservoir and it will be kept on the right temperature independent of the outside air temperature and the added heat of the inking unit.

Type B has internally only a heater and the cooling should be done using a separate cool water flow from an external source. This can be tap water if that is cold enough. On some places the tap water is about 10 degrees which is sufficient to cool the bath for the use with a HSIU4, up to 15 degrees of tap water temperature is fine to reach 23 degrees operating temperature. Higher temperatures of tap water cause that the minimum temperature can not be reached. The minimum difference between desired temperature and cooling water temperature is about 5 degrees. At this minimum difference there is a strong flow of water needed to cool. If the temperature difference is larger there is only a small water flow needed for sufficient cooling.
 
What are the cleaning agents for the rubber and metal cylinders?
FOR CONVENTIONAL OFFSET/LETTERPRESS INKS
Only use lint free rags soaked in cleaning naphtha (boiling point 120 – 150 ˚C) or turpentine. In general, also the environmental friendly cleaning agents used to clean the rubber blankets can be used. Never use the cleaning agents of the UV-inks for these rollers.

FOR UV DRYING INKS
Use lint free rags soaked in ethanol, ethyl acetate, acetone or MEK. Never use the cleaning agents of the conventional inks for these rollers.
 
How many times can I add ink to the inked system?
For the procedure for only a few tests and for the procedure for many tests (left-right-system) it is advised to add ink to the inked system only one time. After having made the trial('s) it is advised to clean the system and to start at the beginning again. Due to the little bit of ink and the mistake in readings by adding several times the inaccuracy will be bigger and this will lead to poor testing results.
 
Does the HSIU4 need calibration?
The speed and the temperature sensor should be calibrated once a year.
 
There are 3 selections for the mode in the inking unit: 1, 2 and 3. What is the purpose of these modes?
With the different modes we can distribute the ink in a different way, dependent to the type of ink, (viscosity, tack, drying time, ink misting.....) and ink film thickness.

In every mode we can adjust the inking times of the printing discs.

Mode 1:
When we start the equipment after applying the ink, the system directly has the adjusted distribution speed.
The variables to adjust are: distribution speed and distribution time.
This mode is used to distribute the ink and to ink the printing discs during a very short time at a high speed. This mode can be used for the quickly drying inks without a strong misting and in the "normal" ink film thickness.

Mode 2:
When we start the equipment after applying the ink, the system starts slowly and the speed increases during a certain time to the adjusted distribution speed.
The variables to adjust are: start up time, distribution speed and distribution time.
This mode is used to distribute the ink and to ink the printing discs during a short time at a high speed. This mode can be used for the "standard" drying inks without a strong misting and in the "high" ink film thickness.

Mode 3:
When we start the equipment after applying the ink, the system starts slowly and the speed increases during a certain time to the 1st distribution speed, the rollers rotate during a 1st distribution time, after this the rollers rotate with another 2nd speed during another 2nd distribution time.
The variables to adjust are: start up time, 1st distribution speed and 1st distribution time, 2nd distribution speed and 2nd distribution time.
This mode is used to distribute the ink and to ink the printing discs during a longer time at a low speed. This mode can be used for the slowly or not drying inks with a strong misting and in the "normal" and high ink film thickness (e.g. pick test oil).
 
A1-3 and A2-3
Is it possible to change the sector with printing width of 20 mm into one for printing width of 32 mm?
Yes, only for the types from 1966 and later (= from type N).
 
Test methods
Heliotest: What is the tolerance between two Heliotest discs from one batch?
In depth/volume +/- 2 –3 %. In measurements of 20th missing dots about +/- 5 mm.
 
Pick testing: Can the pick test results of the AIC2-5/GST be compared with the A1-version?
No, it is not possible to compare the results of the A1 with those of the AIC2-5. The speed curve of both instruments is not the same. This means that the speed at a certain point of the strip of the A1 is not the same as at the same point of the strip of the AIC2-5. Although you have to use the speed table from which you read the speed, this difference has an influence on the speed at the certain point of the strip. The speed curve of the A1 is a bent curve; the speed curve of the AIC2-5 is a straight line (the curve is in the graph speed vs. distance).

To make a correlation between both the instruments you have to make some trials with both instruments, measuring the speed and then making the comparison. In this way you have to make the correlation for every type of paper. In general, the comparison/correlation you only can use for the tested papers.
 
Set off: For what reason is the IGT set off ink 404.003.002 not delivered any longer and what is the alternative?
The ink 404.003.002 is not delivered anymore because manufacturing is not possible anymore. The ink had a very old recipe and the ingredients are not available nowadays and this means that we cannot deliver the same quality. The alternative is the Huber set off ink 404.520.068.
 
Ink transfer: Is there a difference in the ink transfer when using a printing disc with rubber blanket or coated rubber?
The ink transfer is not the same because the materials are not the same. If you want to have the same ink transfer (in g/m2), the amount of ink applied to the inking unit must be changed. We cannot say anything about the correlation because this depends on the type of ink and substrate.
 
Ink transfer: How can the ink transfer in g/m2 be done?
To calculate the ink transfer in g/m2 the inked printing disc has to be weighed on a precision scale with an accuracy of 0.1 mg or better before and after printing. The difference is the ink transferred to the printed strip. The size of the print has to be measured and then the ink transfer in g/m2 can be calculated.

Example of calculation:
The difference in weight of the printing disc is: 10.4 mg
The width of the print is 50 mm and the length is 205 mm. The surface area is 50 x 205 = 10,250 mm2.
1 m2 = 1,000 x 1,000 = 1,000,000 mm2.
The ink transfer is : (1,000,000 : 10,250 ) x  10.4 = 1014 mg/m2 = 1.0 g/m2
 
Wet pick / wet repellence: What are the old and new numbers for the damping discs?
old number   ==   new number ==    water transfer   

width: 58 mm to be used for AIC2-5
402.54.A.70   ==   402.054.002   ==  0.2 g/m2
402.54.B.70   ==   402.054.005   ==  0.5 g/m2
402.54.C.70   ==  402.054.010   ==  1.0 g/m2
402.54.D.70   ==   402.054.015   ==  1.5 g/m2

width: 38 mm to be used for A2-3, AC2, AIC2
402.53.A.70   ==   402.053.002   ==  0.2 g/m2
402.53.B.70   ==   402.053.005   ==  0.5 g/m2
402.53.C.70   ==   402.053.010   ==  1.0 g/m2

width: 52 mm to be used for GST2 and new AIC2-5
402.354.002   ==  0.2 g/m2
402.354.005   ==  0.5 g/m2
402.354.010   ==  1.0 g/m2

Remark: The water transfer of 1.5 g/m2 is too much in many cases. For that reason these discs ore no stock product.
 

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