ASTM D3926-80(1999)

Standard Test Method for Percent Solids in Titanium Dioxide Slurries

SCOPE
1.1 This test method covers the determination of the weight percent of solids in aqueous slurries of titanium dioxide pigments.  
1.2 This test standard does not purport to address all of the safety problems, 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.

General Information

• Status: Historical
• Publication Date: 09-May-1999
• 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 D3926-05 - Standard Test Methods for Percent Solids in Titanium Dioxide Slurries
• Effective Date: 01-Jul-2005

Standards Content (Sample)

NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
Contact ASTM International (www.astm.org) for the latest information
Designation:D3926–80(Reapproved1999)
Standard Test Method for
Percent Solids in Titanium Dioxide Slurries
This standard is issued under the fixed designation D 3926; 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.
Many older ovens will no longer maintain 6 2°C; some will maintain this
1. Scope
tolerance for a while but occasionally the thermostat will “stick” and the
1.1 This test method covers the determination of the weight
temperature will vary considerably.
percent of solids in aqueous slurries of titanium dioxide
5.2 Balance—Laboratory analytical balance, accurate to 0.1
pigments.
mg, with 1-g optical readout range for fast weighing.
1.2 This test standard does not purport to address all of the
safety concerns, if any, associated with its use. It is the
NOTE 2—Periodically check the accuracy of the 1-g optical scale of the
responsibility of the user of this standard to establish appro- balance by use of a known 1-g weight; adjust the balance if needed. The
zeroadjustmentoftheopticalscaleneedstobecheckedatleasteveryhour
priate safety and health practices and determine the applica-
routinely and immediately if there is any possibility of a spill having
bility of regulatory limitations prior to use.
occurred on the balance.
2. Referenced Documents
5.3 Desiccator—Standard laboratory desiccator utilizing an
indicating drying medium.
2.1 ASTM Standards:
D 1193 Specification for Reagent Water
6. Reagents and Materials
3. Summary of Test Method
6.1 Purity of Water—Unless otherwise indicated, references
3.1 Slurry is weighed by difference into a tared aluminum to water shall be understood to mean reagent water conforming
to Type II of Specification D 1193.
foil dish, dried at 105°C in an oven for 1 h, cooled in a
desiccator, and weighed. 6.2 AluminumFoilDish—Disposable aluminum foil dishes,
approximately 60-mm diameter by 18 mm high, 1 to2gin
4. Significance and Use
weight.
4.1 This test method is intended as a quick and reliable 6.3 DisposableSyringeorDropper— Disposable 2 or 3-mL
procedure for measuring the titanium dioxide pigment content syringes or 2 to 5-mL droppers.
of aqueous slurries. Included with the pigment content in the
7. Procedure
percent solids are the various nonvolatile additives used in
7.1 Weigh two new, empty aluminum dishes each to 0.1 mg.
preparing a stable slurry. Because the oxide modifiers on some
titanium dioxide pigments may change somewhat with pro- For each dish, this is W . With a syringe add 2 mL of water to
each dish.
longed drying, in this method the solids of the slurry are
considered dry after heating at 105°C for 60 to 65 min. 7.2 Shake or stir the slurry sample until it is homogeneous
and free of any settled material. If the container is transparent
5. Apparatus
or translucent, the absence of settled material sticking to the
5.1 Oven—Laboratory oven capable of maintaining a tem- bottom of the container can be ascertained visually. Otherwise
perature of 105 6 2°C (Note 1). The oven may be a insert a spatula or the like to make sure there is no settled
gravityconvection type or an oven with a low velocity, forced material.
draft. An oven with a high-velocity, forced-draft air change, 7.3 Immediately withdraw 0.4 to 0.8 g of slurry in a new,
commonly used for baking finishes, is not suitable. empty disposable syringe or dropper.The specified amount can
beestimatedbyapriortrialinanothersyringeordropper.Wipe
NOTE 1—The temperature in the oven must be constantly monitored.
off the slurry from the outside of the syringe or dropper with a
clean, absorbent paper. Cover the sample bottle. Weigh the
This test method is under the jurisdiction of ASTM Committee D-1 on Paint syringe or dropper and slurry to 0.1 mg. This
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