Under 667 is classed information about the industrial aspects of dyestuffs and dyeing (but not dyeing techniques associated with specific industries), of inks and other writing materials, of pigments, and of coatings (paints, varnishes, lacquers etc.) and coating techniques.
BS 1000[667]:1979 history
1979BS 1000[667]:1979 Universal Decimal Classification - English full edition - Colour industries (dyes, inks, paints etc.)