ASTM D280-81(1995)

Standard Test Methods for Hygroscopic Moisture (and Other Matter Volatile Under the Test Conditions) in Pigments

SCOPE
1.1 These methods cover procedures for determining hygroscopic moisture (and other matter volatile under the test conditions) in pigments.  
1.2  This standard does not purport to address all of the safety problems 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.

General Information

• Status: Historical
• Publication Date: 09-May-2001
• ICS: 87.060.10 - Pigments and extenders
• Technical Committee: D01 - Paint and Related Coatings, Materials, and Applications
• Drafting Committee: D01.31 - Pigment Specifications

Relations

• Replaced By: ASTM D280-01 - Standard Test Methods for Hygroscopic Moisture (and Other Matter Volatile Under the Test Conditions) in Pigments
• Effective Date: 10-May-2001
• Referred By: ASTM D4139-04(2020) - Standard Guide for Determining Volatile and Nonvolatile Content of Pigments
• Effective Date: 10-May-2001
• Referred By: ASTM D3722-05(2019) - Standard Specification for Natural Red and Brown Iron Oxide Pigments
• Effective Date: 10-May-2001
• Referred By: ASTM D763-06(2019) - Standard Specification for Raw and Burnt Umber Pigments
• Effective Date: 10-May-2001
• Referred By: ASTM D1199-86(2020) - Standard Specification for Calcium Carbonate Pigments
• Effective Date: 10-May-2001
• Referred By: ASTM D718-86(2020) - Standard Test Methods for Analysis of Aluminum Silicate Pigment
• Effective Date: 10-May-2001
• Referred By: ASTM D3280-85(2020) - Standard Test Methods for Analysis of White Zinc Pigments
• Effective Date: 10-May-2001
• Referred By: ASTM D1394-76(2020) - Standard Test Methods for Chemical Analysis of White Titanium Pigments
• Effective Date: 10-May-2001
• Referred By: ASTM D605-82(2019) - Standard Specification for Magnesium Silicate Pigment (Talc)
• Effective Date: 10-May-2001
• Referred By: ASTM D6280-98(2020) - Standard Specification for Zinc Phosphate Pigments
• Effective Date: 10-May-2001
• Referred By: ASTM D4462-02(2019) - Standard Specification for Zinc Hydroxy Phosphite Pigment
• Effective Date: 10-May-2001
• Referred By: ASTM D1208-96(2019) - Standard Test Methods for Common Properties of Certain Pigments
• Effective Date: 10-May-2001
• Referred By: ASTM D607-82(2019) - Standard Specification for Wet Ground Mica Pigments
• Effective Date: 10-May-2001
• Referred By: ASTM D50-90(2023) - Standard Test Methods for Chemical Analysis of Yellow, Orange, Red, and Brown Pigments Containing Iron and Manganese
• Effective Date: 10-May-2001
• Referred By: ASTM D769-01(2019) - Standard Specification for Black Synthetic Iron Oxide
• Effective Date: 10-May-2001

Standards Content (Sample)

NOTICE: This standard has either been superseded and replaced by a new version or discontinued.
Contact ASTM International (www.astm.org) for the latest information.
Designation: D 280 – 81 (Reapproved 1995)
Standard Test Methods for
Hygroscopic Moisture (and Other Matter Volatile Under the
Test Conditions) in Pigments
This standard is issued under the fixed designation D 280; 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 METHOD B—FOR PIGMENTS THAT DECOMPOSE
AT 110°C
1.1 These test methods cover procedures for determining
hygroscopic moisture (and other matter volatile under the test
4. Apparatus
conditions) in pigments.
4.1 Weighing Bottle, glass, as described in 2.1.
1.2 This standard does not purport to address all of the
4.2 Open-Tube Manometer made of glass tubing 6 mm in
safety concerns, if any, associated with its use. It is the
diameter, filled with mercury to approximately 860 mm, fitted
responsibility of the user of this standard to establish appro-
with rubber pressure tubing attached to a T-joint leading to the
priate safety and health practices and determine the applica-
desiccator and the pump. A suitable low-pressure gage may be
bility of regulatory limitations prior to use.
used in place of the manometer.
METHOD A—FOR PIGMENTS THAT DO NOT
NOTE 1—The difference in levels of the mercury in the manometer
DECOMPOSE AT 110°C
when the system is in operation, subtracted from the barometer reading
taken at the same time, gives the pressure of the system in millimetres of
2. Apparatus
mercury.
2.1 Weighing Bottle, wide-mouth, cylindrical, glass (flat
4.3 Desiccator, glass, having a hole at the side or in the
form, about 30 mm in height and about 70 mm in diameter),
cover, constructed with heavy walls to withstand a vacuum of
provided with a ground-in glass stopper. Or, an aluminum
one atmosphere. The hole at the side shall be closed with a
moisture dish (about 90 mm in diameter and about 50 mm in
one-hole rubber stopper carrying a glass tube with a rubber
depth) with a tightly fitting cover.
tube connection and a pinchcock or with a glass stopcock
2.2 Oven in which a temperature of from 110 6 2°C is
ground to fit the tubulature.
maintained. 2
4.4 Oil Vacuum Pump, able to achieve and hold a vacuum
2.3 Analytical Balance.
of 3 mm.
4.5 Analytical Balance.
3. Procedure
3.1 Weigh accurately the glass weighing bottle and stopper
5. Procedure
or the aluminum moisture dish with cover. Place a specimen of
5.1 Weigh accurately the glass weighing bottle and stopper.
from3to5gofthe pigment in the clean, dry weighing bottle
Place a specimen of from 1 to3gofthe pigment in the clean,
or in the clean, dry aluminum moisture dish. Insert the stopper
dry weighing bottle, insert the stopper and weigh to 0.1 mg.
(or cover) and weigh to 0.1 mg. Subtract the weight of the
Subtract the weight of the vessel from the total weight to obtain
vessel from the total weight to obtain the weight of sample
the weight of sample used in the test.
used in the test. Remove the stopper (or cover) and place it and
5.2 Remove the stopper and place it and the bottle contain-
the bottle (or dish) containing the specimen in an oven that has
ing the specimen in the desiccator con
...