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ASTM D3719-95

(Test Method)

Standard Test Method for Quantifying Dirt Collection on Coated Exterior Panels

Standard Test Method for Quantifying Dirt Collection on Coated Exterior Panels

SCOPE
1.1 This test method covers an instrumental procedure for quantifying the degree of dirt collection on exposed exterior coated panels.
1.2 This test method is limited to those coated exterior panels with lightness values before exposure significantly greater than those after exposure.
1.3 The instrumental readings do not distinguish between mildew growth and other forms of dirt.
1.4 This test method measures total dirt collection. Loose dirt may be washed and removed from specimens if only imbedded dirt collection is to be measured.
1.5 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.

General Information

Status
Historical
Publication Date
09-Nov-2000
ICS
87.040 - Paints and varnishes
Technical Committee
D01 - Paint and Related Coatings, Materials, and Applications
Drafting Committee
D01.52 - Factory Coated Wood Products
Current Stage
Ref Project

Relations

Replaced By
ASTM D3719-00 - Standard Test Method for Quantifying Dirt Collection on Coated Exterior Panels (Withdrawn 2009)
Effective Date
10-Nov-2000
Referred By
ASTM D5324-16(2022) - Standard Guide for Testing Water-Borne Architectural Coatings
Effective Date
10-Nov-2000
Referred By
ASTM D6763-16(2022) - Standard Guide for Testing Exterior Wood Stains and Clear Water Repellents
Effective Date
10-Nov-2000

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ASTM D3719-95 - Standard Test Method for Quantifying Dirt Collection on Coated Exterior PanelsASTM D3719-95 - Standard Test Method for Quantifying Dirt Collection on Coated Exterior Panels
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ASTM D3719-95 - Standard Test Method for Quantifying Dirt Collection on Coated Exterior Panels
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NOTICE: This standard has either been superseded and replaced by a new version or discontinued.
Contact ASTM International (www.astm.org) for the latest information.
Designation: D 3719 – 95
AMERICAN SOCIETY FOR TESTING AND MATERIALS
100 Barr Harbor Dr., West Conshohocken, PA 19428
Reprinted from the Annual Book of ASTM Standards. Copyright ASTM
Standard Test Method for
Quantifying Dirt Collection on Coated Exterior Panels
This standard is issued under the fixed designation D 3719; 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 (e) indicates an editorial change since the last revision or reapproval.
1. Scope 5. Significance and Use
1.1 This test method covers an instrumental procedure for 5.1 Change in color or appearance of coated exterior sur-
quantifying the degree of dirt collection on exposed exterior faces due to such factors as dirt collection or retention is
coated panels. undesirable. If Test Method D 3274 or other test methods are
1.2 This test method is limited to those coated exterior used to establish that dirt collection is the primary cause of
panels with lightness values before exposure greater than those such a change, this test method can be used to quantify the
after exposure. degree of dirt collection or, more properly, the degree of
1.3 The instrumental readings do not distinguish between change in visual appearance of the coated surface due to dirt
mildew growth and other forms of dirt. collection.
1.4 This standard does not purport to address all of the 5.2 When used in this manner and with color change,
safety concerns, if any, associated with its use. It is the exposure duration and environment specified, this test method
responsibility of the user of this standard to establish appro- can provide a performance specification with respect to dirt
priate safety and health practices and determine the applica- collection.
bility of regulatory limitations prior to use.
6. Apparatus and Materials
2. Referenced Documents
6.1 Color Difference Meter, complying with Method
2.1 ASTM Standards: D 2244.
D 823 Practices for Producing Films of Uniform Thickness 6.2 Test Panels, of any convenient size and of substrate
of Paint, Varnish, and Related Products on Test Panels suitable for exterior use.
D 2244 Test Method for Calculation of Color Differences
7. Preparation of Test Panels
from Instrumentally Measured Color Coordinates
7.1 Apply the material under test to the test panels in
D 3274 Test Method for Evaluating Degree of Surface
Disfigurement of Paint Films by Microbial (Fungal or accordance with Test Method D 823, or as agreed upon
between the purchaser and the seller. Allow the final coat of air
Algal) Growth or Soil and Dirt Accumulation
drying systems to cure for 7 days before exposure.
3. Terminology Definition
8. Procedure
3.1 dirt collection—the collection of foreign matter that
8.1 Operate the color difference meter in accordance with
darkens the surface of exterior exposed coated panels.
3.1.1 This test method measures total dirt collection. Loose the manufacturer’s instructions. Standardize with either a
primary or working standard as defined in Test Method
dirt may be washed and removed from specimens if only
imbedded dirt collection is to be measured. D 2244. Restandardize at sufficient intervals, in accordance
with the manufacturer’s instructions, to minimize the effects of
4. Summary of Test Method
instrumental drift.
4.1 Lightness readings using a color difference meter are 8.2 Determine the metric lightnes
...

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FIG. 1 Alignment of Panels for Scrubbing
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1.1 This test method covers an accelerated procedure for determining the resistance of paints to erosion caused by scrubbing. (Note: The term wet abrasion is sometimes used for scrubbing, and wet abrasion resistance or scrubbability for scrub resistance.) Although scrub resistance tests are intended primarily for interior coatings, they are sometimes used with exterior coatings as an additional measure of film performance.  
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