Specification for lac and shellac. Hand-made shellac
Summary:
Specifies six main grades of hand-made shellac. Requirements for matter insoluble in hot alcohol are given along with optional requirements for: volatile matter, colour, wax, ash, lead and grit content, acid iodine values, heat polymerization and flow tests.
Pages:
42
BS 7897-1:1997 International Equivalent:
ISO 56-1:1979
BS 7897-1:1997 Key Phrases:
Lac, Resins (natural), Coatings, Varnishes, Lacquers, Grades (quality), Colour, Insoluble matter determination, Ash determination, Volatile matter determination, Aqueous extraction methods, Non-volatile matter determination, Determination of content, Waxes, Grit, Rosin, Arsenic, Lead, Sampling methods, Specimen preparation, Testing conditions, Test equipment, Design, Dimensions, Colour tests, Solvent extraction methods, Flow measurement, Heating tests, Acid number, Iodine number, Chemical analysis and testing
BS 7897-1:1997 Cross References:
BS 7897-1:1997 Replaces:
