ASTM D6801-02

NOTICE: This standard has either been superceded and replaced by a new version or discontinued.
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Designation: D 6801 – 02
Standard Test Method for
Measuring Maximum Spontaneous Heating Temperature of
Art Materials
This standard is issued under the fixed designation D 6801; 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 temperature rise above that of its surroundings (see Test
Method E 771); also called self heating.
1.1 This test method covers a small-scale laboratory proce-
3.2 Symbols:
dure to determine the self heating tendency of oil-based art
3.2.1 T —difference between maximum spontaneous heat-
D
materials by exposure to elevated temperatures in air in a
ing temperature and control temperature.
controlled semi-adiabatic system.
3.2.2 T —maximum spontaneous heating temperature.
S
1.2 This test method has been developed to address an
3.2.3 T —control temperature or maximum spontaneous
C
urgent need to identify oil-based art materials that may require
temperature measured over 1 h immediately preceding the
labeling for spontaneous heating tendency. Studies based on
beginning of an experiment.
this method may allow the development of a practice to
identify such oil-based art materials.
4. Summary of Test Method
1.3 The values stated in SI units are to be regarded as the
4.1 A non-woven paper cloth is soaked in 1.2 to 1.5 times its
standard. The inch-pound values given in parentheses are for
weight in a oil-based art material mixed with 6 % manganese
information only.
drier at a 1:45 to 1:50 ratio, drier to art material. This soaked
1.4 This standard does not purport to address all of the
pad is then put in a small aluminum holder with air holes in the
safety concerns, if any, associated with its use. It is the
sides. This holder is placed in a larger chamber, which is
responsibility of the user of this standard to establish appro-
opened to the air from the top and heated for 7 to 15 h in a 70°C
priate safety and health practices and determine the applica-
water bath. The maximum spontaneous heating temperature
bility of regulatory limitations prior to use. For safety concerns
inside the soaked paper cloth is recorded with a K thermo-
specific to disposal of solvent-soaked rags, see the appendix.
couple and maximum temperature recorder.
2. Referenced Documents
5. Significance and Use
2.1 ASTM Standards:
5.1 This test method provides a means of accelerating the
E 633 Guide for Use of Thermocouples in Creep and Stress
tendency of a material toward spontaneous heating that may
Rupture Testing to 1000°C (1800°F) in Air
eventually lead to a fire. It is applicable to liquids and pastes.
E 771 Test Method for Spontaneous Heating Tendency of
5.2 The spontaneous heating behavior of an oil-based art
Materials
material is affected by such factors as the availability of
3. Terminology oxygen, the amount of driers present, the degree of polymer-
ization of oils, the surface area of the cellulose material,
3.1 Definitions:
measures to prevent heat dissipation, and the amount of oil in
3.1.1 maximum spontaneous heating temperature,
contact with cellulose material. The rate and magnitude of
n—maximum temperature reached during spontaneous heating
spontaneous heating bears little relationship to the type of
under the specified test conditions.
cellulose material to which an oil-based art material comes in
3.1.2 oil-based art materials, n—vegetable oils that are
contact or whether or not oil soaked materials are first air
used as art materials or art materials that contain vegetable oils.
dried.
3.1.3 spontaneous heating, n—exothermic reaction of a
material due to slow or incomplete reaction that results in a
6. Apparatus
6.1 Constant Temperature Water Bath—water bath that can
maintain water temperature at 70 6 2°C, see Fig. 1.
This test method is under the jurisdiction of ASTM Committee D01 on Paint
and Related Coatings, Materials and Applications, and is the direct responsibility of
6.2 K Thermocouple, as described in Guide E 633.
Subcommittee D01.57 on Artist Paints and Related Materials.
Current edition approved May 10, 2002. Published July 2002. Originally
published as PS 124 - 00. Last previous edition PS 124 - 00.
2 4
Annual Book of ASTM Standards, Vol 03.01. Supporting data are available from ASTM International Headquarters. Request
Annual Book of ASTM Standards, Vol 14.02. RR: D01–1115.
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NOTICE: This standard has either been superceded and replaced by a new version or discontinued.
Contact ASTM International (www.astm.org) for the latest information.
D 6801
FIG. 1 Spontaneous Combustion Apparatus
FIG. 1 (continued)
NOTICE: This standard has either been superceded and replaced by a new version or discontinued.
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D 6801
6.3 Maximum Temperature Recorder,
...