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  • BS 7897-3:1997

    Withdrawn A Withdrawn Standard is one, which is removed from sale, and its unique number can no longer be used. The Standard can be withdrawn and not replaced, or it can be withdrawn and replaced by a Standard with a different number.

    Specification for lac and shellac Bleached lac

    Available format(s):  Hardcopy, PDF

    Withdrawn date:  16-05-2017

    Language(s):  English

    Published date:  15-08-1997

    Publisher:  British Standards Institution

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    Table of Contents - (Show below) - (Hide below)

    Committees responsible
    National foreword
    Specification
    0 Introduction
    1 Scope and field of application
    2 Definitions
    3 Form
    4 Conditions and types
    5 Volatile matter (moisture)
    6 Matter insoluble in hot alcohol
    7 Colour
    8 Wax
    9 Ash
    10 Rosin and copals
    11 Matter soluble in water
    12 Chlorine content
    13 Acidic value and mineral acid
    14 Free chlorine or peroxides
    15 Arsenic
    16 Lead
    17 Requirements
    18 Tests
    19 Sampling
    Annexes
    A Determination of volatile matter (moisture) content
    B Determination of matter insoluble in hot alcohol
    C Comparison of colour
    D Determination of wax
    E Determination of ash
    F Detection of rosin (Halpen-Hicks method)
    G Detection of copals
    H Determination of matter soluble in water
    J Determination of chlorine
    K Determination of acid value
    L Determination of mineral acid
    M Test for free chlorine or peroxides
    N Determination of arsenic
    P Determination of lead
    Q Sampling
    Tables
    1 Requirements for bleached lac
    2 Sieve designations and mesh apertures corresponding
        to specified sizes
    Figures
    1 Extraction apparatus for determining matter insoluble
        in hot alcohol - Method 1
    2 Hot water bath for insoluble matter test - Method 1
    3 Siphon tube and adaptor
    4 Folding of filter paper

    Abstract - (Show below) - (Hide below)

    Gives requirements for two grades differing in matter insoluble in hot alcohol, matter soluble in water, ash and wax content. Definitions, colour, copals, rosin, free chlorine content, arsenic and lead content tests are all specified.

    General Product Information - (Show below) - (Hide below)

    Committee STI/10
    Development Note Reviewed and confirmed by BSI, May, 2005. (04/2005) Also numbered as ISO 57 Supersedes 95/120413 DC and BS 1284(1960) (10/2005)
    Document Type Standard
    Publisher British Standards Institution
    Status Withdrawn
    Supersedes

    Standards Referencing This Book - (Show below) - (Hide below)

    ISO 565:1990 Test sieves — Metal wire cloth, perforated metal plate and electroformed sheet — Nominal sizes of openings
    NFX 11 504 : 1992 METAL WIRE CLOTH AND PERFORATED PLATE FOR TEST SIEVES - TECHNICAL REQUIREMENTS AND VERIFICATIONS
    DIN 4188-1:1977-10 SCREENING SURFACES, WIRE SCREENS FOR TEST SIEVES, DIMENSIONS
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