Analysis of the Effect of Different Illuminants in Print Colorimetric Measurements

Pages:235-238
Dinesh C. (Service Engineer, Creation Offset Press, Ernakulam)

The selection of illuminants will effect the colorimetric measurements in prints. Spectrophotometer can be use to measure colors in numerical values. Today the color measurements are carried out in CIE L* a* b* which is the most accurate color space as compared to other color spaces. Here three illuminants are selected for color measurements. They are D50, D65 and illuminant A. The black color variation is very less under the illuminants D50, D65 and illuminant A and not visible to the human eye at close observation. The cyan color is highly subjected to the color variation then magenta and yellow (Except under D50 and D65) respectively. The solid color patches shows the higher color variation under the different light sources and the certain tint patches are acceptable especially up to 30% tint patches.