ASTM D7190-05

NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
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Designation:D7190–05
Standard Practice to
Evaluate Leaching of Water-Soluble Materials from Latex
Paint Films
This standard is issued under the fixed designation D7190; 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 4.2 Interior paints used in humid areas such as kitchens and
bathrooms may also experience surfactant staining.
1.1 This practice covers the ability of a latex paint film to
4.3 Leaching of water-soluble materials may be dependent
resist staining caused by the leaching of water-soluble materi-
on colorant dispersions that are mixed into tint base paints.
als when contacted with water shortly after application.
Other paint components may also affect the leaching of
1.2 Water staining is attributed to the leaching of surfactants
water-soluble materials.
or other water-soluble materials from a paint film.
1.3 The values stated in SI units are to be regarded as
5. Apparatus
standard.
5.1 Film Applicator, suitable to obtain a wet film thickness
1.4 This standard does not purport to address all of the
typically in the range of 5-10 mils, or as agreed upon between
safety concerns, if any, associated with its use. It is the
manufacturer and supplier.
responsibility of the user of this standard to establish appro-
priate safety and health practices and to determine the
6. Materials
applicability of regulatory limitations prior to use.
6.1 Black plastic panels.
2. Referenced Documents 6.2 Distilled water.
2 6.3 Syringe, 1.0 cc.
2.1 ASTM Standards:
D1308 Test Method for Effect of Household Chemicals on
7. Procedure
Clear and Pigmented Organic Finishes
7.1 Apply the test paint along the long dimension of the
D3924 Specification for Environment for Conditioning and
black plastic panel using the selected film applicator. Allow to
Testing Paint, Varnish, Lacquer, and Related Materials
dry for 4 hours at standard atmospheric conditions of 73.5 6
3.5ºF and relative humidity of 50 6 5 % as specified in
3. Summary of Practice
Specification D3924. Use the same film thickness when com-
3.1 Water droplets are placed on a paint film that is in its
paring a series of latex paint films.
early stages of drying. Stains left behind are evaluated for
7.2 Divide the test panel into three sections, labeling them 4
intensity and how the appearance of the coating has changed.
Hours, 1 Day, and 4 Days or times agreed upon by the
4. Significance and Use manufacturer and supplier. (Fig. 1)
7.3 Place a row of four droplets of distilled water at room
4.1 Surfactant staining is a common problem with exterior
temperature across the top of the first designated section of the
house paints, particularly when subjected to humid environ-
test paint. Each droplet shall be approximately 0.1 cc in
ments (such as morning dew) shortly after application.
volume.
7.4 Allow the wat
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