• Immediately after printing, the white ink is transparent because it does not diffuse the light due to the water contained. The ink starts to look white once the water is absorbed by the CPF.
• When placed between sheets of plain paper before it is dried well or stored in a high humidity environment in the sandwich structure mentioned earlier or in a similar case, if plain paper cockles, white ink may become shaded at the area where plain paper does not touch the printed side because water in white ink cannot be removed well.