Can aluminium pigments be blended into aqueous coatings?
Yes, however, in this case, special products have to be used that have been especially stabilised for this purpose, such as STAPA Hydroxal, STAPA Hydrolac, Stapa Hydrolux or STAPA Hydrolan. Unstabilised aluminium reacts with water to generate hydrogen according to the following reaction equation: 2 Al + 6 H2O ^ 2 Al(OH)3 + 3H2 This reaction can leads to a build-up of pressure in the drum and to the loss / deterioration of the optical properties.
