Astm D 4838 – 88 (Reapproved 2003) pdf free download

Standard Test Method for
Determining the Relative Tinting Strength of Chromatic

This standard is issued under the fixed designation D 4838; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of the 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.

1. Scope

1.1 This test method describes the determination of the
absorption tinting strength of a chromatic test paint relative to
that of a standard or reference paint of the same chemical type.
The procedures are based on dilution of the paints with a
standard mixing of white paint, followed by instrumental measurement and calculation. Provision is made for correcting the
results for small differences in hue or chroma, or both, between
the test and reference chromatic paints.

1.2 This test method is intended for the comparison of
paints containing the same type of vehicle (acrylic, alkyd, or
oil) and single-pigment colorants of the same Colour Index2
name and number. The amounts of the pigment and of the other
components of the paint need not be known.

1.3 The values stated in SI units are to be regarded as the
standard. The values given in parentheses are for information

1.4 This standard does not purport to address all of the
safety concerns, 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.

2. Referenced Documents

2.1 ASTM Standards:
D 1640 Test Methods for Drying, Curing, or Film Formation of Organic Coatings at Room Temperature3
D 4303 Test Methods for Lightfastness of Pigments Used in
Artists’ Paints4
E 284 Terminology of Appearance3

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