ASTM D5150-92(2003)

NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
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Designation:D5150–92(Reapproved2003)
Standard Test Method for
Hiding Power of Architectural Paints Applied by Roller
This standard is issued under the fixed designation D5150; 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 E1347 Test Method for Color and Color-Difference Mea-
surement by Tristimulus Colorimetry
1.1 This test method measures the ability of a paint to hide
or obscure a surface to which it has been applied by a practical
3. Terminology
application procedure. This test method covers the use of a
3.1 Definitions:
paint roller, but the concept is expected to work equally well
3.1.1 hiding power, n—the ability of a paint or paint
when the application tool is a paint brush or paint pad.
material as used to hide or obscure a surface to which it has
1.2 The values stated in inch-pound units are to be regarded
been uniformly applied (see Terminology D16).
as the standard. The values given in parentheses are for
information only.
4. Summary of Test Method
1.3 This standard does not purport to address all of the
4.1 The test paint is applied with a roller at a specified
safety concerns, if any, associated with its use. It is the
spreading rate onto a test chart consisting of a series of light to
responsibility of the user of this standard to establish appro-
dark grey stripes. After drying, a second coat is applied in the
priate safety and health practices and determine the applica-
same manner over half of the chart. After the second coat has
bility of regulatory limitations prior to use.
dried, both the single- and double-coated areas are evaluated
for hiding as judged by the darkest stripe in each area that is
2. Referenced Documents
completely or almost completely obscured.
2.1 ASTM Standards:
D16 Terminology for Paint, Related Coatings, Materials,
5. Significance and Use
and Applications
5.1 Laboratory hiding power measurements of architectural
D1475 Test Method For Density of Liquid Coatings, Inks,
coatingsgenerallyemployblade-typeapplicatorsthatlaydown
and Related Products
films of highly uniform thickness. But practical applicators,
D2244 Practice for Calculation of Color Tolerances and
such as rollers, pads, and brushes, typically apply films that
Color Differences from Instrumentally Measured Color
lack uniformity due to incomplete leveling, resulting in the
Coordinates
practical hiding power of most paints being less than that
D3924 Specification for Environment for Conditioning and
measured on films applied with a drawdown blade. This test
Testing Paint, Varnish, Lacquer, and Related Materials
method simulates practical application procedures and condi-
D3925 Practice for Sampling Liquid Paints and Related
tions so as to provide an indication of the actual hiding
Pigmented Coatings
performance obtainable when a paint is applied by an experi-
enced worker. It is not intended to duplicate painting as done
This test method is under the jurisdiction of ASTM Committee D01 on Paint
by the average consumer.
and Related Coatings, Materials, andApplications and is the direct responsibility of
5.2 Since the rheological characteristics of a paint and its
Subcommittee D01.42 on Architectural Coatings.
interaction with the applicator are influencing factors, rank
Current edition approved Jan. 10, 2003. Published April 2003. Originally
´1
order correlation between this test and one done by drawdown
approved in 1991. Last previous edition approved in 1997 as D5150 – 92 (1997) .
DOI: 10.1520/D5150-92R03.
might not be obtained.
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
6. Apparatus
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website. 6.1 Balance, accurate to 0.1 g.
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D5150–92 (2003)
9.2 Use the following equation to determine the amount of
paint required for each coat on 3 ft of chart area:
1362 3 Paint Density ~lb/gal!
2 2
Grams for 3 ft ~2787 m ! 5
Desired Spreading Rate ~ft /gal!
The spreading rate may be either the manufacturer’s recom-
mended spreading rate for each paint, or the same spreading
rate for all paints under test according to agreement between
2 2
producer and user. A spreading rate of 450 ft /gal (11.0 m /L)
is suggested if there is no other preference. Include spreading
rate(s) used in the report.
9.3 At a convenient height, tape a test chart with the long
direction horizontal, to a surface that is vertical or within 5° of
vertical (top sloping away from the operator). The tape should
be placed on the vertical, numbered border stripes that are
2 2
outside the 6 ft (5575 cm ) test area of the chart.
FIG. 1 Practical Opacity Chart in Accordance with Footnote 5 and
9.4 Prepare the paint roller for use in the test by the
Appendix X1
following procedure:
9.4.1 Load the roller cover with paint from the tray by
6.2 A Weight/Gallon Cup, or any other type of pycnometer
rolling it through paint so that just the nap is submersed (see
suitable for determining paint density to 0.1 lb/gal.
Fig. 2).
6.3 Paint Roller, 3-in. (75-mm), frame, preferably one per
9.4.2 Roll out the loaded cover onto a scrap surface, in an
paint to be tested.
upward and downward motion, within an area no larger than
6.4 Paint Roller Cover, 3-in. (75-mm) length, with a short
1-ft (0.3-m) high by the 3-in. (75-mm) width of the roller
3 1
nap ( ⁄16 to ⁄4 in. (4.8 to 6.4 mm) constructed from a woven
cover.
fabric. New unused roller covers are preferred but used roller
9.4.3 Reloadtherollercoverandrollitoutagaininthesame
covers may be used but must be thoroughly cleaned so the
manner as 9.4.2 and over the same area. Do not increase the
resulting appearance is like a new roller cover. When two or
area except as necessary to control excess dripping of paint.
more coatings are being tested with the latter type of roller
9.4.4 Repeat the procedure as necessary until the following
cover, each should have been used approximately the same
conditions are met:
number of times and should be well dried out from previous
9.4.4.1 Reloading the paint roller cover does not result in
applications.
increased paint pickup.
6.5 Paint Tray.
9.4.4.2 Thereissomuchpaintonthesurfacebeingusedthat
the fully-loaded paint roller cover cannot transfer any more
7. Materials
paint to the surface.
7.1 Practical Opacity Charts—These are smooth surface,
9.4.5 Now immediately perform the test.
sealed paper test charts on which are printed a 6-step series of
9.5 Load the roller cover fully, just short of dripping and
grey stripes of increasing darkness numbered from 1 to 6. The
weigh. Either weigh the paint and roller before and after, or the
2 2
test area is 6 ft (5575 cm ). For more complete details see Fig.
paint and reservoir before and after. Do not weigh the paint on
1 and the manufacturer’s description in the appendix.
the chart, as even minimal evaporation results in significant
7.2 Masking Tape.
inaccuracies.Apply to a small area of the left half of the chart,
just to deposi
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