ISO 57:1975/Amd 1:1996

Bleached lac — Specification — Amendment 1

Gomme laque blanche — Spécifications — Amendement 1

General Information

• Status: Withdrawn
• Publication Date: 13-Nov-1996
• Withdrawal Date: 13-Nov-1996
• ICS: 87.060.20 - Binders
• Technical Committee: ISO/TC 50 - Lac -- STAND-BY
• Drafting Committee: ISO/TC 50 - Lac -- STAND-BY
• Current Stage: 9599 - Withdrawal of International Standard
• Completion Date: 13-Apr-2000

Relations

• Child: ISO 57:1975 - Bleached lac — Specification
• Effective Date: 15-Apr-2008
• Revises: ISO 57:1975 - Bleached lac — Specification
• Effective Date: 15-Apr-2008

Standards Content (Sample)

INTERNATIONAL IS0
STANDARD
57
First edition
1975-02-01
AMENDMENT 1
1996-I l-l 5
Bleached lac
- Specification
AMENDMENT 1
Gomme laque blanche - Spkification
AMENDEMENT I
Reference number
IS0 57:1975/Amd.l:1996(E)

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IS0 57:1975/Amd.l:1996(E)
Foreword
IS0 (the International Organization for Standardization) is a worldwide
federation of national standards bodies (IS0 member bodies). The work of
preparing International Standards is normally carried out through IS0
technical committees. Each member body interested in a subject for which
a technical committee has been established has the right to be rep-
resented on that committee. International organizations, governmental and
non-governmental, in liaison with ISO, also take part in the work. IS0
collaborates closely with the International Electrotechnical Commission
(IEC) on all matters of electrotechnical standardization.
Draft International Standards adopted by the technical committees are
circulated to the member bodies for voting. Publication as an International
Standard requires approval by at least 75 % of the member bodies casting
a vote.
Amendment 1 to International Standard IS0 57:1975 was prepared by
Technical Committee ISO/TC 50, Lat.
0 IS0 1996
All rights reserved. Unless otherwise specified, no part of this publication may be reproduced
or utilized in any form or by any means, electronic or mechanical, including photocopying and
microfilm, without permission in writing from the publisher.
International Organization for Standardization
Case postale 56 l CH-1211 Geneve 20 l Switzerland
Printed in Switzerland
ii

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@ IS0 IS0 57:1975/Amd.l:1996(E)
Bleached lac - Specification
AMENDMENT 1
Page 8, subclause 6.2.4.4. I, penultimate line
Correct the speDing of “draugths” to “draughts”.
Page 14, subclause E. 1.7
Replace the last sentence with the following:
Alternatively, heat in a muffle furnace at 650 “C to 700 “C until constant mass is obtained.
Page 14, subclause F. 1.5
Add the following note after F.1.5:
NOTE - The solution should preferably be stored in amber-coloured bottles.
Page 18, clause L.2
Add a new paragraph at the end of clause L.2:
Alternatively, a potentiometric method may be used.
Page 21, Annex P
Replace the text of the existing annex with the following:
P. 1 General
The lead content of bleached lac can be determined by either of the two methods described below. However, in
case of dispute, method B may be used as the referee method for determination of lead.
P.2 Method A
Renumber clauses P.1 to P.4 as P.2.1, P.2.2, P.2.2.1, P.2.2.2, P.2.2.3, P.2.2.4, P.2.2.5, P.2.2.6, P.2.2.7, P.2.2.8,
P.2.2.9, P.2.2.9.1, P.2.2.9.2, P.2.2.10, P.2.2.11, P.2.3, P.2.3.1, P.2.3.2, P.2.3.3, P.2.3.4, P.2.3.5 and P.2.4
respectively.
1

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@ IS0
IS0 57:1975/Amd.l:1996(E)
- Atomic absorption spectrometric method
P.3 Method B
P.3.1 Principle
The sample is brought into solution by suitable treatment with acid or acid combinations, diluted with distilled
water, filtered and suitable dilutions made for aspiration into the ai
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