It is known that coating changes the color specifications of the printed-coated paper such as L, a, b and also DeltaE. We observed that these parameters were changed by adding the nano-TiO2 to the coater. In theory, the nano-TiO2 would be expected to promote curing of the coating, but it is not obvious why it would affect the color.
Which kind of changes do you have? Did you achieve a good dispersion of the nanoparticles? Maybe it is related with the dispersion of the nanoparticles.
Dear Marina
Thanks for your consideration.Delta E of CMYK inks were significantly changed. For example, DeltaE of Yellow ink increased and, Magenta and Black inks decreased by increasing the nano intensity. we achived a good dispersion.
by change of absorption, reflection and scattering properties it should have an influence.
Dear Dr. sobisch
Thanks a lot for your comment.
Is there any relationship between Color change (or total color change- Delta E) and TiO2 photocatalytic properties?
Regards
Any changes in roughness due to applying nano-TiO2 might affect the color change. It would be better to check any roughness variations between uncoated and coated materials.
Dear Dr. Behbood
Greeting. Thanks for your consideration. We didn't have any significant change on the roughness of Nano-treated samples.
Thanks and Regards
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