Procedure to improve the solidity to the light, weather, sulfurous anhydride and sulfylide acid of the pigments based on lead chromatos. (Machine-translation by Google Translate, not legally binding)

摘要

Process to improve the light fastness, weathering, sulfur dioxide and hydrogen sulfide of pigments based on lead chromates, which is essentially characterized by conditioning the pigment once it has been precipitated, aged and washed by a surface treatment in two phases: the first of which is added an organic acid with one or several carboxylic groups followed by titanium and antimony salts capable of giving oxides hydrated by neutralization, and in the second of which salts of aluminum and sodium silicate are added again, in the second neutralization will give hydrated oxides. (Machine-translation by Google Translate, not legally binding)