How we scored it
Where it comes from
Manufactured by calcining kaolin clay with sulfur, soda ash and silica at high temperature to recreate the aluminosilicate cage of natural lapis lazuli. CosIng calls the process 'synthetic', but every atom traces to mineral feedstocks, matching the convention already used for titanium dioxide and iron oxides.
In plain English
A blue, green, pink, red or violet pigment made by fusing clay, sulfur, soda and silica at high temperature. Although manufactured, it's built entirely from mineral raw materials, recreating the historic lapis lazuli pigment.
CosIng definition: Ultramarines (blue, green, pink, red and violet) are synthetic pigments composed of complex sodium aluminum sulfosilicates having a typical formula Na(AlSiO)S with proportions of each element varying with each colour. To identify the colorant allowed for use in the European Union (EU), the INCI Name CI 77007 must be used.
Structure
hexaaluminum;hexasodium;bis(tetrathietane);hexasilicate
References
- 1ISO 16128-1:2016 and ISO 16128-2:2017 — Guidelines on technical definitions and criteria for natural and organic cosmetic ingredients and products. ISO, Geneva.
- 2Ultramarines. PubChem CID 91667813. National Center for Biotechnology Information. pubchem.ncbi.nlm.nih.gov ↗
- 3ULTRAMARINES. CosIng — European Commission cosmetic ingredient database. ec.europa.eu/cosing ↗
- 4ULTRAMARINES. CosIng u2014 European Commission database for information on cosmetic substances and ingredients. https://ec.europa.eu/growth/tools-databases/cosing/search?search=ULTRAMARINES