| What | To visualise certain aspects of the substrate a stereo microscope is in place (up till and including enlargement of 165 times). Light sources available are direct -and chafing light. |
| Why | To look into reasons causing e.g. piling, printing disturbance, surface pollution, crease problems etc. To illustrate we can make a photograph with a Canon SC30 digital camera, mounted on top of the microscope. |
| What | To visualise certain aspects of the substrate a Docucenter is in place (up till and including enlargement factor 8) Light sources available are chafing light, transmitted light, direct light in D50, D65, UV, infra-red and fluorescent light and optional use of several filters (different wavelengths) |
| Why | To look into reasons causing e.g. piling, printing disturbance, surface pollution, crease problems etc.; to show surface differences (e.g. roughness), to show sheet formation (cloudiness) or safety elements like watermarks, holographic features, filaments. To illustrate we can make a photograph with a built-in camera with split screen possibilities. |
| What | To quickly check certain aspects of the substrate or printing ink a light booth is in place, with light sources D65, D50, Tungsten and UV. |
| Why | To check e.g. on OBA content or metamerism. Metamerism is the phenomenon that two objects under certain circumstances seem to have the same colour, whereas under different circumstances a difference in colour is visible. The spectra of two different light sources are metameric when the colour of those sources are the same to the human eye. |
