ISO 56-1:1979/Amd 1:1996

INTERNATIONAL
STANDARD 56-1
First edition
1979-04-O 1
AMENDMENT 1
1996-l 2-15
Shellac - Specification -
Part 1:
Hand-made shellac
AMENDMENT 1
Gomme laque en feuilles - Sphfkation -
Partie 7: Gomme laque en feuilles de fabrication manuelle
AMENDEMENT?
Reference number
IS0 56-l : 1979/Amd. 1: 1996(E)

IS0 5601:1979/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 56-l :I 979 was prepared by
Technical Committee lSO/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 mecha nical, including photocopy1 ng and
microfilm, without permi ssion in writing from the publisher.
International Organization for Standardization
Case postale 56 l CH-12 11
Geneve 20 l Switzerland
Printed in Switzerland
IS0 56-1:1979/Amd.l:1996(E)
- Specification -
Shellac
Part 1:
Hand-made shellac
AMENDMENT 1
Page 9, subclause B. 1.5
Add the following note after B.1.5:
NOTE - The solution should preferably be stored in amber-coloured bottles.
Page 13, subclause D.3. I. 7
In the title, replace the word “tint” with the word “tin”.
Page 17, Annex F
Replace the text of the existing annex with the following:
F. 1 General
The colour index of shellac 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 colour index.
F.2 Method A
Renumber clauses F.l to F.5.2 as F.Z.1, F.2.2, F.2.2.1, F.2.2.2, F.2.3, F.2.3.1, F.2.3.2, F.2.4, F.2.4.1, F.2.4.2, F.2.5,
F.2.5.1 and F.2.5.2 respectively and delete the number of subclause F.4.2.1.
F.3 Method B
F.3.1 Principle
The optical density of an alcoholic shellac solution (concentration I,0 g/l) is measured at a particular wavelength in
the visible range, which, after multipli
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