ASTM D765-87(2009)

NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.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:D765 −87(Reapproved2009)
Standard Specification for
Raw and Burnt Sienna Pigments
This standard is issued under the fixed designation D765; 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 (´) indicates an editorial change since the last revision or reapproval.
1. Scope smooth paint of brushing consistency. It shall mix readily in all
proportions, without curdling, with linseed oil, turpentine, or
1.1 This specification covers the pigments commercially
volatile petroleum spirits, or any mixture of these substances.
known as raw sienna and burnt sienna.
The paste shall conform to the following requirements:
2. Referenced Documents
Pigment, min, % 60
Nonvolatile vehicle, min, of vehicle 80
2.1 ASTM Standards:
Moisture by distillation, max, % 2.0
D50 Test Methods for ChemicalAnalysis ofYellow, Orange, Coarse particles and skins (total residue retained on a No. 325 (45-µm) 1.0
sieve), max, % of dry pigment
Red, and Brown Pigments Containing Iron and Manga-
3.3 The mass color and character of the tint and the tinting
nese
strength formed by a mixture with a white pigment shall be
D185 Test Methods for Coarse Particles in Pigments
within mutually agreed upon limits of a standard acceptable to
D280 Test Methods for Hygroscopic Moisture (and Other
both the purchaser and the seller.
Matter Volatile Under the Test Conditions) in Pigments
D387 Test Method for Color and Strength of Chromatic
4. Sampling
Pigments with a Mechanical Muller
D1208 Test Methods for Common Properties of Certain
4.1 Two samples shall be taken at random from different
Pigments
packages from each lot, batch, day’s pack, or other unit of
production in a shipment. When no markings distinguishing
3. Composition and Properties
between units of production appear, samples shall be taken
3.1 Dry Pigments—The pigments shall conform to the
from different packages in the ratio of two samples for each 5
following requirements:
tons (inch-pound or SI), except that for shipments of less than
3.1.1 Raw Sienna—The pigment shall be in a soft, dry form
10 000 lb two samples shall be taken. At the option of the
and shall be a hydrated oxide of iron permeating a siliceous
purchaser, the samples may be tested separately or after
base. The pigment shall conform to the requirements for
blending in equal quantities the samples from the same
composition prescribed in Table 1.
production unit to form a composite sample.
3.1.2 Burnt Sienna—The pigment shall be produced by the
calcinationofrawsiennaandshallconformtotherequirements
5. Test Methods
for composition prescribed in Table 1.
5.1 Tests shall be conducted in accordance with the appro-
3.2 PasteinOil—Forbothrawandburntsienna,thepastein
priate ASTM test methods. Test procedures not covered by
oil shall be made by thoroughly grinding the pigment with
ASTM test methods shall be mutually agreed upon by the
linseed oil (with or without a small amount of volatile thinner)
purchaser and the seller.
together with (where necessary) small amounts
...