Assertion: solid coloring material | /r/HasProperty | prepared by precipitation
Facets:
value: in an aqueous medium
type: LOCATION
Source sentences:
text: These solid coloring materials are prepared by precipitation, in an aqueous medium, of a reaction product of an alkali metal silicate with a colored complex, the colored complex obtained by reaction, in aqueous solution, of at least one hydrolysable tannin, or of a plant extract comprising at least one hydrolysable tannin, with a salt of a metal cation.