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Ref. No.: lSO/ R 183 - 1981 (E)
IS0
I N T E R N AT1 O N A L ORGAN I Z AT I ON FOR
S TA N DARD I Z AT I O N
IS0 RECOMMEN
DATION
R 183
PLASTICS
DETERMINATION OF THE BLEEDING OF COLOURANTS
1st ED I TI ON
February 1961
COPYRIGHT RESERVED
The copyright of IS0 Recommendations and IS0 Standards
belongs to IS0 Member Bodies. Reproduction of these
documents, in any country, may be authorized therefore only
by the national standards organization of that country, being
a member of ISO.
For each individual country the only valid standard is the national standard of that country.
Printed in Switzerland
Also issued in French and Russian, Copies to be obtained through the national standards organizations.
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BRIEF HISTORY
The IS0 Recommendation R 183, Determination of the Bleeding of Colourants, was
drawn up by Technical Committee ISO/TC 61, Plastics, the Secretariat of which is held by
the American Standards Association, Incorporated (ASA),
Work on this matter which the Technical Committee had begun since 1955, came to
an end in 1957, with the adoption of a proposal as a Draft IS0 Recommendation.
On 8 May 1959, the Draft IS0 Recornmendation (No. 218) was distributed to all the
IS0 Member Bodies and was approved, by the following Member Bodies :
Austria India Sweden
Belgium Israel Switzerland
Burma Italy Turkey
Czechoslovakia Japan United Kingdom
Finland Netherlands U.S.A.
France
Portugal U.S.S.R.
Germany Romania
Hungary Spain
No Member Body opposed the approval of the Draft.
The Draft IS0 Recommendation was then submitted by correspondence to the IS0
Council, which decided, in February 1961, to accept it as an IS0 RECOMMENDATION.
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IS0 / R 183 - 1961 (E)
IS0 Recommendation R 183 February 1961
PLASTICS
DETERMINATION OF THE BLEEDING OF COLOURANTS
1. SCOPE
This test is carried out in order to determine the tendency of some colouring materials to " bleed
off" or to migrate from a plastics material into other materials, if both substances are brought
into close contact with each other.
2. DERINITION
" Colour bleeding " is to be considered as the migration of a dye present in a plastics material
from the plastic itself into any other material, if both materials are in close contact. This
" bleeding " may be due either to the low compatibility of the colouring matter with the plastics
material which lets it exude on the surface, or to the solubility of the colouring matter in a
plasticizer with migrating tendencies,
The colour bleeding depends also on the nature of the " acceptor ", which therefore needs to be
exactly defined.
3. SIGNIFICANCE OF TEST
This method is suitable only for a 'qualitative evaluation of the tendency of colouring matters
to migrate from plastics in which they are compounded, into other materials.
4. TEST SPECIMENS
4.1 The test specimen should be in the form of a 50 mm square, cut directly from a sheet of
the material to be tested.
4.2 If the material to be tested is an extrusion or moulding compound in granules or in chips,
a sheet is obtained from it with a suitable moulding method, and the specimen is cu
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