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UDC 667.6
IS0
IS0 RECOMMENDATION
R 339
DEFINITION OF TERMS
APPEARING IN IS0 RECOMMENDATIONS
FOR OILS AND PIGMENTS
1st EDITION
September 1963
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 339, DeJinitions of Ternis Appearing in IS0 Recommendations
for Oils and Pigments, was drawn up by Technical committee ISO/TC 35, Raw Materials Jor
Paints, Varnishes and Similar Products, the Secretariat of which is held by the Stichting Nederlands
Normaliçatie-iiistituut ("1).
Work on this question by the Technical Committee began in 1950 and led, in 1959, to the
adoption of a Draft IS0 Recommendation.
In July 1960, this Draft IS0 Recommendation (No. 387) was circulated to all the IS0
It was approved, subject to a few modifications of an editorial
Member Bodies for enquiry.
nature, by the following Member Bodies :
Argentina Germany Republic of
Austria Greece South Africa
--
Romania
Bulgaria India
Iran Spain
Canada
Chile Ireland Sweden
Colombia Israel Turkey
Czechoslovakia Japan United Kingdom
U.S.S.R.
Denmark New Zealand
Yugoslavia
Portugal
Egypt
Three Member Bodies opposed the approval of the Draft:
Belgium, France, Italy.
The Draft IS0 Recommendation was then submitted by correspondence to the IS0 Council,
which decided, in September 1963, to accept it as an IS0 RECOMMENDATION.
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IÇO/R 339 - 1963 (E)
IS0 Recommendation R 339 September 1963
DEFINITIONS OF TERMS APPEARING IN
IS0 RECOMMENDATIONS FOR OILS AND PIGMENTS
t-
1. OILS
1.1 Acid value. Number of milligrammes of potassium hydroxide (KOH) required to
neutralize the free acidity in one gramme of oil. Free organic acidity is also expressed
by the equivalent number of milligrammes of oleic, palmitic, etc. acids.
1.2 Ash.
Minerai residue of the oil remaining after incineration under specified conditions
of test.
1.3 Drying time. Time which elapses between the application of a wet film of oil and the
attainment of a specified dry state under specified conditions of test.
1.4 Flash point. Minimum temperature of a liquid at which the vapours given off are sufficient
to form a flammable mixture with air, under specified conditions of test.
Foots.
1.5 Settled layer which collects at the bottom of the container, when the oil is allowed
to stand, under specified conditions of test.
1.6 Polybromide value. Mass, in grammes, of polybromides, obtained when 100 g of oil are
examined under specified conditions of test.
Iodine value.
1.7 Mass of halogen, expressed as grammes of iodine, which reacts with 100 g
of oil under specified conditions of test.
1.8 Refractive index of an oil, for a given wavelength. Ratio of the sine of the angle of inci-
dence to the sine of the angle of refraction when a ray of light of this wavelength passes
from air into the oil. Unless otherwise specified, the refractive index is given for a wave-
length equal to the mean of those of the D-lines of sodium (wavelength 589.3 mp).
The notation nt at to always denotes the index relating to the D-line where t is the tempe-
rature in degrees C at which the determination is made (either 20 or 40 OC). If the deter-
mination is made in relation to wavelength x, the notation is n:.
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ISO/R 339 - 1963 (E)
1.9 SaponiJication value. Number of milligrammes of potassium hydroxide (KOH) required
for the saponification of the saponifiable matter contained in one gramme of material,
determined under specified conditions.
1.10
UnsaponiJable matter. Un
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