Aldehyde is used for ink and paint

Product Name: Aldehyde Ketone Resin Place of Origin: China

Features:
1) Made from the synthetic reaction of anone and formaldehyde
2) Used for ink and paint
3) Increases adhesion force and makes the ink or paint have good 
    fluidity
4) Reduces viscosity
5) Speeds up drying time

Source:  http://ghrcco.en.alibaba.com/product/50024722/50120691/Aldehyde_Ketone_Resins/Aldehyde_Ketone_Resin.html