ASTM D763-06

NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
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Designation:D763 −06
StandardSpecification for
1
Raw and Burnt Umber Pigments
This standard is issued under the fixed designation D763; 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 3.2 PasteinOil—Forbothrawandburntumber,thepastein
oil shall be made by thoroughly grinding the pigment with
1.1 This specification covers the pigments commercially
linseed oil (with or without a small amount of volatile thinner)
known as raw umber and burnt umber.
together with (where necessary) small amounts of wetting or
1.2 The values stated in SI units are to be regarded as the
dispersing agents to produce a paste or semipaste of satisfac-
standard. The values given in parentheses are for information
tory consistency. As received, it shall not be caked in the
only.
container and shall break up readily in linseed oil to form a
smooth paint of brushing consistency. It shall mix readily in all
2. Referenced Documents
proportions, without curdling, with linseed oil, turpentine, or
2
2.1 ASTM Standards:
volatile petroleum spirits, or any mixture of these substances.
D50 Test Methods for ChemicalAnalysis ofYellow, Orange,
The paste shall conform to the following requirements:
Red, and Brown Pigments Containing Iron and Manga-
Pigment, min, % 55
nese
Nonvolatile vehicle, min, % 80
Moisture by distillation, max, % 2.0
D185 Test Methods for Coarse Particles in Pigments
Coarse particles and skins (total residue retained on a 1.0
D280 Test Methods for Hygroscopic Moisture (and Other
No. 325 (45-µm sieve), max, % of dry pigment
Matter Volatile Under the Test Conditions) in Pigments
3.3 The mass color and character of the tint and the tinting
D387 Test Method for Color and Strength of Chromatic
strength formed by a mixture with a white pigment shall be
Pigments with a Mechanical Muller
within mutually agreed upon limits of a standard acceptable to
D1208 Test Methods for Common Properties of Certain
both the purchaser and the seller.
Pigments
4. Sampling
3. Composition and Properties
4.1 Two samples shall be taken at random from different
3.1 Dry Pigments—The pigments shall conform to the
packages from each lot, batch, day’s pack, or other unit of
following requirements:
production in a shipment. When no markings distinguishing
3.1.1 Raw Umber—The pigment shall be in a soft, dry form
between units of production appear, samples shall be taken
and shall be a hydrated oxide of iron (together with such
from different packages in the ratio of two samples for each
manganese that is naturally associated with it) permeating a
4540 kg or 10 000 lb, except that for shipments of less than
siliceous base and shall be free of admixtures of other
10 000 lb, two samples shall be taken. At the option of the
substancesexceptcarbonpigments.Thepigmentshallconform
purchaser, the samples may be tested separately or after
to the requirements for composition prescribed in Table 1.
blending in equal quantities the samples from the same
3.1.2 Burnt Umber—The pigment shall be produced by the
production unit to form a composite sample.
calc
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