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ASTM D6686-01(2008)e1

(Test Method)

Standard Test Method for Evaluation of Tannin Stain Resistance of Coatings

Standard Test Method for Evaluation of Tannin Stain Resistance of Coatings

SIGNIFICANCE AND USE
Tannins and other chromophoric extractives are naturally occurring materials in wood and wood-based substrates. Tannins are prevalent to a high degree in cedar, redwood, oak and to a lesser degree in white and yellow pine. Tannins are also present in varying amounts in wood composition products. These extractives are solubilized and darkened in color by aqueous coatings, resulting in unsightly yellow or brown discolorations. This test method is designed to show the relative ability of paints to prevent tannin bleed-through. Typically cedar or redwood panels are used for this test.
SCOPE
1.1 This test method is an accelerated procedure to determine the effectiveness of latex coatings at preventing the migration of tannin stains from wood substrates.
1.2 The values in SI units are to be regarded as the standard. The values in parenthesis are for information only.
1.3 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
31-May-2008
ICS
19.040 - Environmental testing
25.220.01 - Surface treatment and coating in general
Technical Committee
D01 - Paint and Related Coatings, Materials, and Applications
Drafting Committee
D01.42 - Architectural Coatings
Current Stage
Ref Project

Relations

Replaces
ASTM D6686-01 - Standard Test Method for Evaluation of Tannin Stain Resistance of Coatings
Effective Date
01-Jun-2008
Replaced By
ASTM D6686-01(2008)e2 - Standard Test Method for Evaluation of Tannin Stain Resistance of Coatings
Effective Date
01-Jun-2008
Referred By
ASTM D5324-16(2022) - Standard Guide for Testing Water-Borne Architectural Coatings
Effective Date
01-Jun-2008
Referred By
ASTM D6763-16(2022) - Standard Guide for Testing Exterior Wood Stains and Clear Water Repellents
Effective Date
01-Jun-2008
Referred By
ASTM D5146-10(2019) - Standard Guide to Testing Solvent-Borne Architectural Coatings
Effective Date
01-Jun-2008

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ASTM D6686-01(2008)e1 - Standard Test Method for Evaluation of Tannin Stain Resistance of CoatingsASTM D6686-01(2008)e1 - Standard Test Method for Evaluation of Tannin Stain Resistance of Coatings
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ASTM D6686-01(2008)e1 - Standard Test Method for Evaluation of Tannin Stain Resistance of Coatings
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Standards Content (Sample)


NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
Contact ASTM International (www.astm.org) for the latest information
´1
Designation:D6686–01(Reapproved2008)
Standard Test Method for
Evaluation of Tannin Stain Resistance of Coatings
This standard is issued under the fixed designation D6686; 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.
´ NOTE—An editorial change was made in 3.1.1 in June 2008.
1. Scope and are placed on or in the test chamber. CIELAB L* and b*
valuesaswellassubjectiveratingsarerecordedafterexposure.
1.1 This test method is an accelerated procedure to deter-
mine the effectiveness of latex coatings at preventing the
5. Significance and Use
migration of tannin stains from wood substrates.
5.1 Tannins and other chromophoric extractives are natu-
1.2 The values in SI units are to be regarded as the standard.
rally occurring materials in wood and wood-based substrates.
The values in parenthesis are for information only.
Tannins are prevalent to a high degree in cedar, redwood, oak
1.3 This standard does not purport to address all of the
and to a lesser degree in white and yellow pine. Tannins are
safety concerns, if any, associated with its use. It is the
alsopresentinvaryingamountsinwoodcompositionproducts.
responsibility of the user of this standard to establish appro-
These extractives are solubilized and darkened in color by
priate safety and health practices and determine the applica-
aqueous coatings, resulting in unsightly yellow or brown
bility of regulatory limitations prior to use.
discolorations. This test method is designed to show the
2. Referenced Documents relative ability of paints to prevent tannin bleed-through.
Typically cedar or redwood panels are used for this test.
2.1 ASTM Standards:
D1475 Test Method For Density of Liquid Coatings, Inks,
6. Apparatus
and Related Products
6.1 Test Chamber, as described in Practice D4585.
D4585 Practice for Testing Water Resistance of Coatings
6.2 Test Substrate, 2.4 by 19.2 cm (6 by 48 in.) substrate or
Using Controlled Condensation
of a size agreed upon by the purchaser and seller of the coating
D5068 Practice for Preparation of Paint Brushes for Evalu-
being tested.
ation
6.3 Paint Brush, nylon/polyester brush of good quality.
3. Terminology 6.4 Spectrophotometer.
6.5 Electronic Balance.
3.1 Definitions:
6.6 Conditioned Room, at 18 to 29.5°C (65 to 85°F) and 40
3.1.1 tannin stain resistance, n—the ability of a coating to
to 60 % relative humidity.
prevent the migration of tannins or other wood-based chromo-
spheres to the surface of a film.
7. Reagents and Materials
4. Summary of Test Method 7.1 Wood Panels—Such as cedar, redwood, oak, white pine,
yellow pine or other substrate as agreed upon between the
4.1 This test method utilizes a condensation test chamber to
purchaser and the seller of the coating being tested.
determine the tannin stain resistance of latex paints. The test
7.2 Control Paint—An agreed-upon paint of known tannin
paints are applied to substrates that contain tannin extractives
stain resistance.
7.3 Test Paints—Since there are no standard panels, photo-
This test method is under the jurisdiction of ASTM Committee D01 on Paint
graphs, or paints for this test method, an agreed-upon control
and Related Coatings, Materials, andApplications and is the direct responsibility of
paint (7.2) should be included as one of the test paints.
Subcommittee D01.42 on Architectural Coatings.
Current edition approved June 1, 2008. Published June 2008. Originally
8. Procedure
approved in 2001. Last previous edition approved in 2001 as D6686 - 01. DOI:
10.1520/D6686-01R08E01.
8.1 Choose a substrate with a consistent grain pattern.
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
Patterns vary greatly from panel to panel, so try to select a
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
board that has consistent wood grain across the length of the
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website. substrate. Results may vary from panel to panel because of
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
´1
D6686–01 (2008)
different growth rates, grain angles, colors and species of in the specimen rack with test boards or blanks. Close all
wood. If necessary, panels may be sanded to remove raised cracks between boards to prevent water vapor loss and tem-
grain. Substrates with areas of rough spots should be avoided, perature variation. Larger cracks may be closed with tape or
as they will bleed through more readily. Divide substrate into metal strips. If the panels are placed inside the chamber, make
stripsatleast2.4cm(6in.)wideorasagreeduponbetweenthe sure panels are placed at an angle to avoid water spotting and
purchaser and the seller and label the back of each test area run off onto the test areas.
with paint designation.The control paint should be placed near 8.7 Adjust the thermostat to maintain
...

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SCOPE
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SCOPE
1.1 This test method, commonly referred to as the L-37-1 test, describes a test procedure for evaluating the load-carrying capacity, wear performance, and extreme pressure properties of a gear lubricant in a hypoid axle under conditions of low-speed, high-torque operation.3  
1.2 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.  
1.2.1 Exceptions—Where there is no direct SI equivalent such as National Pipe threads/diameters, tubing size, or where there is a sole source supply equipment specification.
1.2.1.1 The drawing in Annex A6 is in inch-pound units.  
1.3 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, health, and environmental practices and determine the applicability of regulatory limitations prior to use. Specific warning statements are provided in 7.2 and 10.1.  
1.4 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.

  • Standard
    18 pages
    English language
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  • Standard
    18 pages
    English language
    sale 15% off