ASTM D765-87(2003)

NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
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Designation: D 765 – 87 (Reapproved 2003)
Standard Specification for
Raw and Burnt Sienna Pigments
This standard is issued under the fixed designation D 765; 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.
TABLE 1 Requirements for Composition of Raw and Burnt
1. Scope
Sienna
1.1 This specification covers the pigments commercially
Raw Burnt
known as raw sienna and burnt sienna.
Sienna Sienna
Iron oxide (Fe O ), min, % 38 40
2 2
2. Referenced Documents
Calcium compounds (as CaO) max, % 5.0 5.0
2.1 ASTM Standards: Moisture and other volatile matter, max, % 4.0 4.0
Coarse particles (total residue retained on a No. 325 2.0 2.0
D 50 Test Methods for Chemical Analysis of Yellow, Or-
(45-µm) sieve), max, %
ange, Red, and Brown Pigments Containing Iron and
Organic colors, max, % none none
Manganese
D 185 Test Methods for Coarse Particles in Pigments,
Pastes, and Paints
proportions, without curdling, with linseed oil, turpentine, or
D 280 Test Methods of Hygroscopic Moisture (and Other
volatile petroleum spirits, or any mixture of these substances.
Matter Volatile Under the Test Conditions) in Pigments
The paste shall conform to the following requirements:
D 387 Test Method for Color and Strength of Chromatic
Pigment, min, % 60
Pigments with a Mechanical Muller
Nonvolatile vehicle, min, of vehicle 80
D 1208 Test Methods for Common Properties of Certain
Moisture by distillation, max, % 2.0
Pigments
Coarse particles and skins (total residue retained on a No. 325 (45-µm) 1.0
sieve), max, % of dry pigment
3. Composition and Properties
3.3 The mass color and character of the tint and the tinting
3.1 Dry Pigments—The pigments shall conform to the
strength formed by a mixture with a white pigment shall be
following requirements:
within mutually agreed upon limits of a standard acceptable to
3.1.1 Raw Sienna—The pigment shall be in a soft, dry form
both the purchaser and the seller.
and shall be a hydrated oxide of iron permeating a siliceous
base. The pigment shall conform to the requirements for 4. Sampling
composition prescribed in Table 1.
4.1 Two samples shall be taken at random from different
3.1.2 Burnt Sienna—The pigment shall be produced by the
packages from each lot, batch, day’s pack, or other unit of
calcinationofrawsiennaandshallconformtotherequirements
production in a shipment. When no markings distinguishing
for composition prescribed in Table 1.
between units of production appear, samples shall be taken
3.2 Paste in Oil—For both raw and burnt sienna, the paste
from different packages in the ratio of two samples for each 5
in oil shall be made by thoroughly grinding the pigment with
tons (inch-pound or SI), except that for shipments of less than
linseed oil (with or without a small amount of volatile thinner)
10 000 lb two samples shall be taken. A
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