ASTM D1208-96(2002)

NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
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Designation:D1208–96(Reapproved 2002)
Standard Test Methods for
Common Properties of Certain Pigments
This standard is issued under the fixed designation D 1208; 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.
This standard has been approved for use by agencies of the Department of Defense.
1. Scope 3. Significance and Use
1.1 These test methods cover procedures for determining 3.1 This collection of test methods is used by pigment
certain properties of pigments. The procedures appear in the producers and paint manufacturers for process control, for
following order: product acceptance, and for research and development.
Dry Pigments Sections
LOSS ON IGNITION AND ASH
Loss on Ignition and Ash 4
Matter Soluble in Water 5 4. Procedure
Hydrogen Ion Concentration (pH 6
4.1 Dry about5gofthe sample at 105 62°C for 2 h.
Value)
Alkalinity or Acidity by Titration 7 and 8
Transfer about1gofthe dried pigment, weighed to 0.1 mg, to
Water Content (Distillation Method) 9 and 10
a previously ignited, weighed porcelain crucible, and ignite at
900to1000°Cfor20min.Coolinadesiccatorandweigh.Heat
Pigment Pastes in Oil
again for 10 min at 900 to 1000°C to check the loss in weight.
Water Content (Distillation Method) 9 and 10
4.2 Calculation—Calculate the percent of loss on ignition,
Pigment Content of Paste in Oil 11
L, and of ash, A, as follows:
Total Volatile Matter in Paste in Oil 12
L
w
1.2 This standard does not purport to address all of the
L 5 3 100 (1)
S
safety concerns, if any, associated with its use. It is the
W
responsibility of the user of this standard to establish appro-
a
A 5 3 100
S D
S
priate safety and health practices and determine the applica-
bility of regulatory limitations prior to use.
where:
L = loss in weight on ignition, g,
2. Referenced Documents w
A = ash, %,
2.1 ASTM Standards:
W = weight of ash, g, and
a
D 95 Test Method for Water in Petroleum Products and
S = specimen weight, g.
Bituminous Materials by Distillation
D 280 Test Methods for Hygroscopic Moisture (and Other
MATTER SOLUBLE IN WATER
Matter Volatile Under the Test Conditions) in Pigments
D 1135 Test Methods for Chemical Analysis of Blue Pig-
5. Procedure (Note 1)
ments
5.1 Weigh about 10 g of the sample to 1 mg, and place in a
E 70 Test Method for pH of Aqueous Solutions with the
400-mL beaker.Add 100 mL of water (Note 2), boil for 5 min
Glass Electrode
cool, and transfer quantitatively to a 250-mL volumetric flask.
Dilutewithwaterto250mL,mix,andallowtosettle.Filterthe
supernatant liquid through a dry paper (Note 3) and discard the
These test methods are under the jurisdiction of ASTM Committee D01 on
first 25 mL. Evaporate 100 mL of the clear filtrate to dryness
Paint and Related Coatings, Materials, and Applications, and are the direct
responsibility of Subcommittee D01.31 on Pigment Specifications.
in a weighed flatbottom dish, preferably in an oven at 105
Current edition approved Nov. 10, 1996. Published January 1997. Originally
62°C. Cool and weigh.
e1
published as D 1208 – 52 T. Last previous edition D 1208 – 84 (1989) .
Annual Book of ASTM Standards, Vol 05.01.
NOTE 1—This test method is not suitable for use with iron blue
Annual Book of ASTM Standards, Vol 06.03.
pigment. Use the conductivity method given in Test Methods D 1135.
Annual Book of ASTM Standards, Vol 15.05.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
D1208
NOTE 2—If the pigment is found to be strongly water-repellent, wet the
WATER CONTENT
sample with a small amount of alcohol or carry out a preliminary washing
with chloroform.
9. Apparatus
NOTE 3—Water-dispersible pigments must be filtered with a suitable
9.1 Distillation Apparatus—A water distillation apparatus
filter pad or the method may not be applicable.
consisting of a 250-mL roundbottom flask, a straight-tube
5.2 Calculation—Calculate the percent of matter soluble in
reflux condenser, and a graduated receiving trap similar to Fig.
water, M, as follows:
1of Test Method D 95.
R 3 2.5
1 9.2 Heat Source consisting of a gas burner and oil bath, or
M 5 3 100 (2)
S
2 an electric heater of the enclosed element type.
where:
10. Procedure (Note 5 and Note 6)
R = residue weight, g, and
10.1 Place 50 g of the sample in the flask and add 100 mL
S = specimen weight, g.
of toluene or of petroleum solvent having a boiling point
between 110 and 120°C. Mix well. Add more solvent, if
HYDROGEN ION CONCENTRATION (pH VALUE)
necessary, to cover the pigment.
6. Procedure
10.2 Rinse the inner tube of the condenser with a little
6.1 Determine hydrogen ion concentration in accordance toluene or petroleum solvent just before starting the distilla-
tion, so as to wet the inner surface completely. Distill at a
with either of the following methods:
6.1.1 Electrometric Method (Preferred Procedure)—Weigh moderate rate until the volume of condensed water no longer
increases (about 3 h). If any water is lodged in the condenser
about5gofthe sample to 10 mg, place in a 150-mL beaker,
and add 50 g of warm distilled water, freshly boiled to remove tube at the end of the test, wash it down with solvent or with
a brush wetted
...