11 public-domain matches
Colouring
IS 11826: Recommended practice for chemical colouring for engineering components in general and for bicycle components
Worthington - Flavouring and Colouring Beer, British Patent 1468 of 1881
CARAMEL COLOURING IN SOFT COLD DRINKS (17-Aug-2012)
Contributions towards the History of the Colouring Matters Derived from Coal-Tar
A Few Facts Relative to the Colouring Matters of Some Vegetables.

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