ASTM D5355-95
(Test Method)Standard Test Method for Specific Gravity of Oils and Liquid Fats
Standard Test Method for Specific Gravity of Oils and Liquid Fats
SCOPE
1.1 This test method covers the determination of the specific gravity of oils and liquid fats by calculating the ratio of the weight of a unit volume of the sample to the weight of a unit volume of water at 25°C.
1.2 The values stated in SI units are to be regarded as the standard.
1.3 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.
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Designation: D 5355 – 95
Standard Test Method for
Specific Gravity of Oils and Liquid Fats
This standard is issued under the fixed designation D 5355; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A
superscript epsilon (e) indicates an editorial change since the last revision or reapproval.
1. Scope 5. Procedure
1.1 This test method covers the determination of the specific 5.1 Calibration of the Specific Gravity Bottles—Clean and
gravity of oils and liquid fats by calculating the ratio of the dry thoroughly and then fill with recently boiled and cooled
weight of a unit volume of the sample to the weight of a unit distilled water at 20 to 23°C. Fill the bottle to overflowing by
volume of water at 25°C. holding the bottle on its side in such a manner as to prevent the
1.2 The values stated in SI units are to be regarded as the entrapment of air bubbles. Insert the stopper and immerse in a
standard. water bath at 25 6 0.2°C. Keep the entire bulb completely
1.3 This standard does not purport to address all of the covered with water and hold at the specified temperature for 30
safety concerns, if any, associated with its use. It is the min. Carefully remove any water that has exuded from the side
responsibility of the user of this standard to establish appro- opening. Remove the bottle from the bath and wipe completely
priate safety and health practices and determine the applica- dry. Weigh the bottle and contents. Calculate the weight of
bility of regulatory limitations prior to use. water in the flask by subtracting the weight of the empty bottle
from the weight of the bottle plus the water.
2. Terminology
5.2 Specific Gravity at 25/25°C:
2.1 Definitions:
5.2.1 Melt the sample and filter through filter paper to
2.1.1 density—weight/unit volume expressed as grams per remove any impurities and the last traces of moisture. The
centimetre.
sample must be completely dry.
2.1.2 liquid fats—fats that melt below 58°C. 5.2.2 Cool the sample from 20 to 23°C and fill the bottle to
2.1.3 oils—substances that are fluid at 25°C, consisting of
overflowing, holding the bottle on its side in such a manner as
glycerides of fatty acids, aliphatic hydrocarbons, and aromatic to prevent the entrapment of air bubbles.
hydrocarbons.
5.2.3 Insert the stopper, immerse, and hold in the water bath
2.1.4 specific gravity—the ratio of the density of a substance at 25 6 0.2°C for 30 min.
to the density of the reference substance.
5.2.4 Carefully wipe off any oil that has come through the
capillary opening and remove from the bath. Clean and dry
3. Significance and Use
thoroughly.
3.1 This test method is used to measure the specific gravity
5.2.5 Weigh the bottle and contents. Calculate the specific
of all oils and liquid fats that are used to soften leather, or that
gravity as directed in 5.1.
are used in products to soften leather. The specific gravity is
5.3 Specific Gravity at 60/25°C:
one parameter tha
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