{"id":32293,"date":"2019-03-15T12:57:29","date_gmt":"2019-03-15T12:57:29","guid":{"rendered":"https:\/\/www.igt.nl\/visual-assessment\/"},"modified":"2019-03-15T12:57:29","modified_gmt":"2019-03-15T12:57:29","slug":"visual-assessment","status":"publish","type":"page","link":"https:\/\/www.igt.nl\/us\/laboratory-testing\/visual-assessment\/","title":{"rendered":"Visual assessment"},"content":{"rendered":"

[vc_row][vc_column][vc_column_text]<\/p>\n

Microscopy:<\/h3>\n\n\n\n\n
What<\/td>\nTo 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.<\/td>\n<\/tr>\n
Why<\/td>\nTo 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.<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

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Docucenter:<\/h3>\n\n\n\n\n
What<\/td>\nTo 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)<\/td>\n<\/tr>\n
Why<\/td>\nTo 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.<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

[\/vc_column_text][\/vc_column][\/vc_row][vc_row][vc_column][vc_column_text]<\/p>\n

Light booth:<\/h3>\n\n\n\n\n
What<\/td>\nTo quickly check certain aspects of the substrate or printing ink a light booth is in place, with light sources D65, D50, Tungsten and UV.<\/td>\n<\/tr>\n
Why<\/td>\nTo 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.<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

[\/vc_column_text][\/vc_column][\/vc_row]<\/p>\n<\/div>","protected":false},"excerpt":{"rendered":"

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