Assessment of color changes during the drying the of ink used in offset printing technique

In the sheet-fed offset printing technique, the ink physically and chemically drying in accordance with the surface structure of the printing material. Dried ink needs to give a good colour intensity, while constituting a thin film on the surface of printing materials. The visual quality of the printed matter depends largely on the optimum level of unification between the printing material and the ink. Especially the ink?s fixation and drying process on the material. In this study, the ink density changes depending on drying in offset printing and the printed ink?s L *(lightness), a*(red-green), b*(yellow-blue) assets in definite times were measured. With these measures done in the 0, 15, 30, 45, 60 and 90. minutes on spectrophotometer and densitometer standart drying conditions, how to be affected the color spaces by the drying and the settlement process? effect on color spaces was examined. The obtained valves were formed in tables and the drying behaviours and the ?E varietions were carried out. With color valves obtained from CIE L*a*b* kind, in which levels high color exchange occured were determined.