Analysis of the dark-brown-black coating revealed that both the colorant and medium consisted of multiple components.
In that case the use of such colorants was prohibited in a large number of products.
There is also a positive element in the annexes, listing, for example, colorants which can be used in preparations which come into contact with mucous membranes.
Beta-cyclodextrin complexes with certain carotenoid food colorants have been shown to intensify color, increase water solubility and improve light stability.
The paint is adjusted with additives and colorants as necessary.
At high temperatures the carbon will bond with and remove the oxygen in the metal oxides used as colorants in the glazes.
Ideal colorants will produce a pure, intense color when present in moderate concentration.
By the late 1920s new colorants had been developed that were very enticing to the printing industry.
