The subject of the standard is a chemically hardened colorless varnis called Chemolak - a solution of amine and phthalic resins in butanol and xylene, with the addition of dibutyl phthalate and silicone oil.
PN BN 6114-04-1963 history
1963PN BN 6114-04-1963 Chemically Hardened Coatings Colorless Chemical Coatings