23 ноября, 2015 
Pokraskin Ultramarines can be categorized as either laundry grades, which are low-strength and sometimes low-purity materials, or as industrial/technical grades, which are high-strength, high-purity pigments.
Factories in the People’s Republic of China, and India produce on the whole laundry grade materials. There are only three major producers of high-grade ultramarine pigments — Holliday Pigments (United Kingdom, France), DKK (Japan), and Nubi — ola (Spain, Romania, India, Colombia). In 2000 total worldwide production of all ultramarine was ca. 25,000 t a-1.
3.6
Опубликовано в рубрике 