ASTM D6801-02a

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Designation: D 6801 – 02a
Standard Test Method for
Measuring Maximum Spontaneous Heating Temperature of
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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 3.1.2 oil-based art materials, n—vegetable oils that are
usedasartmaterialsorartmaterialsthatcontainvegetableoils.
1.1 This test method covers a small-scale laboratory proce-
3.1.3 spontaneous heating, n—exothermic reaction of a
dure to determine the self heating tendency of oil-based art
material due to slow or incomplete reaction that results in a
materials by exposure to elevated temperatures in air in a
temperature rise above that of its surroundings (see Test
controlled semi-adiabatic system.
Method E 771); also called self heating.
1.2 This test method has been developed to address an
3.2 Symbols:
urgent need to identify oil-based art materials that may require
3.2.1 T —difference between maximum spontaneous heat-
labeling for spontaneous heating tendency. Studies based on D
ing temperature and control temperature.
this method may allow the development of a practice to
3.2.2 T —maximum spontaneous heating temperature.
identify such oil-based art materials. S
3.2.3 T —control temperature or maximum spontaneous
C
1.3 The values stated in SI units are to be regarded as the
temperature measured over 1 h immediately preceding the
standard. The inch-pound values given in parentheses are for
beginning of an experiment.
information only.
1.4 This standard does not purport to address all of the
4. Summary of Test Method
safety concerns, if any, associated with its use. It is the
4.1 Anon-woven paper cloth is covered uniformly in 1.2 to
responsibility of the user of this standard to establish appro-
1.5 times its weight in a oil-based art material mixed with
priate safety and health practices and determine the applica-
6–10 % manganese drier at a 1:45 to 1:50 ratio, drier to art
bility of regulatory limitations prior to use. For safety concerns
material. This covered pad is then put in a small stainless steel
specific to disposal of solvent-soaked rags, see the appendix.
holder with air holes in the sides. This holder is placed in a
2. Referenced Documents larger chamber, which is opened to the air from the top and
heated for 7 to 15 h in a 70°C water bath. The maximum
2.1 ASTM Standards:
spontaneous heating temperature inside the soaked paper cloth
E 633 Guide for Use of Thermocouples in Creep and Stress
2 is recorded with a K thermocouple and maximum temperature
Rupture Testing to 1000°C (1800°F) in Air
recorder.
E 771 Test Method for Spontaneous Heating Tendency of
3
Materials
5. Significance and Use
3. Terminology 5.1 This test method provides a means of accelerating the
tendency of a material toward spontaneous heating that may
3.1 Definitions:
eventually lead to a fire. It is applicable to liquids and pastes.
3.1.1 maximum spontaneous heating temperature,
5.2 The spontaneous heating behavior of an oil-based art
n—maximum temperature reached during spontaneous heating
material is affected by such factors as the availability of
under the specified test conditions.
oxygen, the amount of driers present, the degree of polymer-
ization of oils, the surface area of the cellulose material,
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This test method is under the jurisdiction of ASTM Committee D01 on Paint measures to prevent heat dissipation, and the amount of oil in
and Related Coatings, Materials, and Applications , and is the direct responsibility
contact with cellulose material. The rate and magnitude of
of Subcommittee D01.57 on Artist Paints and Related Materials.
spontaneous heating bears little relationship to the type of
Current edition approved Dec. 10, 2002. Published February 2003. Originally
approved in 2000 as PS 124 - 00. Last previous edition approved in 2002 as
D 6801 - 02.
2
Annual Book of ASTM Standards, Vol 03.01.
3
Annual Book of ASTM Standards, Vol 14.02.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
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D 6801 – 02a
FIG. 1 Spontaneous Combustion Apparatus
cellulose material to which an oil-based art material comes in 8. Procedure
contact or whether or not oil soaked materials are first air
8.1 Fillwaterbathwithwaterandheatuntilwaterisat70°C
4
dried.
6 2°C.
8.2 Weigh the non-woven paper cloth. Prepare 1.2 to 1.5
6. Apparatus
times its weight of liquid or paste art material.
6.1 Constant Temperature Water Bath—water bath that can
8.3 Mix the liquid or paste art material tho
...