BS 7897-1:1997

Committees responsible
National foreword
Specification
0 Introduction
1 Scope and field of application
2 Definitions
3 Form and condition
4 Grades
5 Mandatory requirements
6 Optional requirements
7 Sampling
Annexes
A Determination of matter insoluble in hot alcohol
B Detection of rosin (Halpen-hicks method)
C Detection of orpiment
D Determination of arsenic content
E Determination of volatile matter (moisture) content
F Determination of colour index
G Determination of wax
H Determination of ash
J Determination of matter soluble in water and test for
    neutrality of aqueous extract
K Flow test
L Heat Polymerization test
M Determination of acid value
N Determination of lead content
P Determination of grit content
Q Determination of iodine value
R Sampling
Figures
1 Extraction apparatus for determination of matter insoluble
    in hot alcohol (method 1)
2 Hot water bath for determination of matter insoluble
    in hot alcohol (method 1)
3 Siphon tube and adaptor
4 Folding of filter paper
5 Kjeldahl distillation apparatus for use in the
    determination of arsenic content (method 1)
6 Apparatus for the determination of arsenic content
    (method 1)
7 Apparatus for flow test
8 Essential features of the testing fixture F
9 Heat polymerization test apparatus

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.