1、Designation: D 6864 03ae1An American National StandardStandard Specification forColor and Appearance Retention of Solid Colored PlasticSiding Products1This standard is issued under the fixed designation D 6864; the number immediately following the designation indicates the year oforiginal adoption o
2、r, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. Asuperscript epsilon (e) indicates an editorial change since the last revision or reapproval.e1NOTESection X1.4 was editorially revised in February 2004.1. Scope1.1 This specificatio
3、n establishes requirements and testmethods for the color and appearance retention of solid coloredplastic siding products.1.2 Color retention testing provides a method for estimatingthe acceptability of color change in a siding product over aperiod of years of service.1.3 Methods of indicating compl
4、iance with this specifica-tion are provided.2. Referenced Documents2.1 ASTM Standards:2D 883 Terminology Relating to PlasticsD 1435 Practice for Outdoor Weathering of PlasticsD 1600 Terminology for Abbreviated Terms Related toPlasticsD 2244 Test Method for Calculation of Color Differencesfrom Instru
5、mentally Measured Color CoordinatesD 3679 Specification for Rigid Poly Vinyl Chloride (PVC)SidingE 805 Practice for Identification of Instrumental Methods ofColor or Color-Difference, Measurement of MaterialsG 147 Practice for Conditioning and Handling of Nonme-tallic Materials for Natural and Artif
6、icial Weathering Tests2.2 Other Reference:Vinyl Siding Institute (VSI) Technical Research Report forWeatherability of Vinyl Siding Products, VS2WNOTE 1This report supports the conclusion that commercial vinylsiding products which demonstrate weathering behavior within conform-ance to these standards
7、 during a two year test program can be anticipatedto provide acceptable color retention properties for the expected life of theproduct.3. Terminology3.1 DefinitionsDefinitions are in accordance with Termi-nologies D 883 and D 1600 unless otherwise noted.3.2 Definitions of Terms Specific to This Stan
8、dard:3.2.1 color regionparameters that define the color spacefor a siding measured with Hunter Units, Illuminant C, 2observer, specular component included.3.2.1.1 DiscussionThe color values used to classify colorsby region will be established by measuring the Hunter L, a, bcolor values from the samp
9、le population, calculating theaverage for Hunter L, a, b, and then choosing the integer fromthe corresponding L, a, b average values (that is, no roundingup or down) to be used to classify colors by region.3.2.2 ellipsoid valuea mathematical calculation derivedby inserting the measured DL, Da, and D
10、b values of aweathered specimen into an ellipsoid equation.3.2.3 Region 1Brown:L = 20 to 49a=1to5b=2to113.2.4 Region 2Medium Blue:L = 45 to 64a=8to1b = 12 to 23.2.5 Region 3Light Blue:L = 65 to 89a=8to1b = 12 to 23.2.6 Region 4Green:L = 50 to 84a = 12 to 1b=1to103.2.7 Region 5Medium Beige:L = 50 to
11、74 L = 50 to 64 L = 65 to 74a=0to1 a=2to1 a=7to0b=4to12 b=11to14 b=11to121This specification is under the jurisdiction of ASTM Committee D20 onPlastics and is the direct responsibility of Subcommittee D20.24 on Plastic BuildingProducts.Current edition approved Dec. 1, 2003. Published January 2004. O
12、riginallyapproved in 2003. Last previous addition approved in 2003 as D686403e1.2For referenced ASTM standards, visit the ASTM website, www.astm.org, orcontact ASTM Customer Service at serviceastm.org. For Annual Book of ASTMStandards volume information, refer to the standards Document Summary page
13、onthe ASTM website.1Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.3.2.8 Region 6Light Beige:L = 75 to 84 L = 85 to 93 L = 75 to 84a=0to1 a=7to1 a=7to1b=4to12 b=4to12 b=11to123.2.9 Region 7Gold:L = 65 to 93a=0to4b=13to303.2.10 Region
14、 8Yellow:L = 65 to 93a = 10 to 1b=13to303.2.11 Region 9White:L = 85 to 100 All L = 94 to 100a=2to1b=1to33.2.12 Region 10Light Gray:L = 65 to 84a=0to1b=1to33.2.13 Region 11Mauve:L = 65 to 93 L = 65 to 93 L = 50 to 64a=2to11 a=5to11 a=2to11b=2to12 b=13to15 b=2to153.2.14 Region 12Medium Gray:L = 50 to
15、64a=0to1b=1to33.2.15 Region 13Dark Gray:L = 25 to 49a=1to5b=1to13.2.16 Region 14Dark Blue:L = 25 to 44a=8to3b = 12 to 23.2.17 Region 15Dark Green:L = 25 to 49a = 20 to 2b=1to113.2.18 Region 16Dark Red:L = 25 to 49a=6to30b=1to254. Classification4.1 DefinitionsDefinitions are in accordance with Termi-
16、nologies D 883 and D 1600 unless otherwise noted.4.1.1 color retention standardspredictive color regionsdescribed by a three dimensional model which constituteacceptable color retention levels resulting from weathering ofa specific product type and color. Color retention standards aredefined by equa
17、tions that describe the three dimensionalellipsoid value.4.1.2 Region 1Brown:DL 2 1.6!25.2!21Da 1 1.0!23.0!21Db 2 0.5!22.5!25 Ellipsoid Value4.1.3 Region 2Medium Blue:DL 1 1.0!26.0!21Da 1 0.6!22.9!21Db 2 0.8!25.4!25 Ellipsoid Value4.1.4 Region 3Light Blue:DL 1 0.3!26.4!21Da 1 0.1!22.7!21Db 2 0.8!24.
18、3!25 Ellipsoid Value4.1.5 Region 4Green:DL 0.2!25.9!21Da 2 0.8!24.8!21Db 2 0.2!25.6!25 Ellipsoid Value4.1.6 Region 5Medium Beige:DL 1 0.4!25.8!21Da 2 0.0!22.8!21Db 2 0.0!24.0!25 Ellipsoid Value4.1.7 Region 6Light Beige:DL 2 0.0!25.0!21Da 2 0.2!22.6!21Db 2 0.3!25.4!25 Ellipsoid Value4.1.8 Region 7Gol
19、d:DL 1 0.6!26.6!21Da 1 0.3!23.4!21Db 1 0.4!24.7!25 Ellipsoid Value4.1.9 Region 8Yellow:DL 1 0.3!25.5!21Da 2 1.0!23.3!21Db 1 0.1!25.5!25 Ellipsoid Value4.1.10 Region 9White:DL 2 0.6!28.2!21Da 1 0.0!23.3!21Db 2 1.9!25.3!25 Ellipsoid Value4.1.11 Region 10Light Gray:DL 1 1.8!27.0!21Da 2 0.2!22.1!21Db 2
20、1.3!24.0!25 Ellipsoid Value4.1.12 Region 11Mauve:DL 2 0.4!26.5!21Da 2 0.8!24.0!21Db 2 1.1!24.5!25 Ellipsoid Value4.1.13 Region 12Medium Gray:DL 1 1.0!26.6!21Da 1 0.3!22.5!21Db 2 0.5!23.0!25 Ellipsoid Value4.1.14 Region 13Dark Gray:DL 2 0.1!25.1!21Da 1 0.8!23.4!21Db 1 0.1!23.0!25 Ellipsoid Value4.1.1
21、5 Region 14Dark Blue:DL 2 0.3!25.2!21Da 2 1.0!23.6!21Db 1 1.3!24.5!25 Ellipsoid Value4.1.16 Region 15Dark Green:DL 2 0.0!25.0!21Da 1 0.4!23.0!21Db 1 0.2!23.8!25 Ellipsoid Value4.1.17 Region 16Dark Red:DL 2 0.4!25.4!21Da 2 0.8!24.0!21Db 2 0.2!23.0!25 Ellipsoid Value5. Procedure for Measuring Color Re
22、tention5.1 Test Site Setup and Exposure Duration Test Times:D 6864 03ae125.1.1 Samples shall be exposed at three test sites: TemperateNorthern represented by a site located in Louisville, KY orCleveland, OH; hot, humid represented by a site located inMiami, FL; and hot, dry represented by a site loc
23、ated inPhoenix, AZ. Additional test sites may be used as agreed uponby the buyer and the seller.5.1.2 All exposures shall be conducted at an angle of 45facing South and backed using unpainted plywood in accor-dance to Practices D 1435 and G 147.5.1.3 Remove test specimens for color measurement at 24
24、month exposures. In some cases, 24 months may not besufficient to distinguish material durability differences andlonger exposure periods may be necessary. Additional expo-sure times may be used as agreed upon by the buyer and theseller.5.2 Sampling and Specimen Preparation:5.2.1 Samples shall be rep
25、resentative of the product to beevaluated.NOTE 2Samples prepared in the laboratory in the same manner ascommercial samples may be used as an alternate to a commercial part. Ifthe commercial product is extruded, the laboratory specimen must beextruded; if the commercial product is injection molded, t
26、he laboratoryspecimen must be injection molded, and so forth.5.2.2 Select a minimum of 4 specimens per sample per testsite to allow for 3 test specimens and 1 file specimen for eachsample evaluated.5.2.3 Specimens shall be a flat section and a minimum of 2by 334 in. (51 by 95 mm).5.2.4 Mark each spe
27、cimen permanently to ensure retentionof identity during and after exposure testing.NOTE 3Use of a vibratool leaves a permanent mark that satisfies thiscriteria.5.3 Data Record:5.3.1 Measured specimen color values shall be reported toone decimal place.5.3.2 Calculation of color units shall be reporte
28、d to onedecimal place.5.4 Practice:5.4.1 Obtain test and file specimens in accordance to 5.2.5.4.2 Measure in replicate the original tristimulus X, Y, andZ values for the file specimen using Illuminant C, 2 observer,and specular component included in accordance with PracticeE 805. Calculate the Hunt
29、er L, a, and b units in accordancewith the equations in the section on “Hunter L, a, and b ColorSpace and Color-Difference Equation” in Test Method D 2244using the average of the replicate measurements and recordthem in a permanent record.5.4.3 Expose the test specimens at the test sites in accor-da
30、nce with 5.1.1 and 5.1.2. Record in a permanent record thetest start date.5.4.4 Remove the test specimens at the exposure interval(s)in accordance with 5.1.3. Record in a permanent record thedate the specimens are removed from the exposure test rack forcolor measurement.5.4.5 The exposed test specim
31、ens should shall be measuredfor color and evaluated for appearance. It is recommended thatcolor measurement and appearance evaluation be conducted atthe test site. Color measurement shall take place within 7 daysof specimen removal from the exposure test rack. It isrecommended that color measurement
32、 take place within 48 h ofthe specimens removal from the exposure test rack.NOTE 4Additional color development is known to occur for PVCproducts after removal from exposure to ultraviolet (UV) light. Thisartificial color change is referred to as Dark Time Yellowing. Colormeasurement within 48 h of r
33、emoval is strongly recommended for PVCproducts.5.4.6 Wash the exposed test specimens in accordance withthe procedure in Annex A1.5.4.7 Inspect each exposed test specimen for appearanceand surface condition. Record observations and inspection datein a permanent record.5.4.8 Measure and record the col
34、or of each test specimen inaccordance with 5.4.2 for each exposure time. Record in apermanent record the date the color of the specimen(s) ismeasured.5.4.9 Calculate and record the change in Hunter L, a, and bunits for each specimen with reference to the specimens initialcolor as determined in 5.4.2
35、.5.4.10 In cases where specimens are evaluated at exposuretimes other than 24 months, the specimens shall be returned tothe exposure test rack within 7 days for continuation of the test;it is recommended the samples be returned to the test rackswithin 48 h. Record in a permanent record the date thes
36、pecimens are returned to the exposure test rack.NOTE 5In case of dispute, the referee procedure shall be the use ofseparate specimens for each exposure time that can then be disposed aftercolor measurements are made.6. Performance Requirements6.1 The ellipsoid value for an individual specimen is cal
37、cu-lated using the measured color change and the appropriatecolor region equation found in Section 4.6.2 Acceptable color retention is determined by the averageellipsoid value of the three test specimens being less than orequal to 1.0. This value shall be calculated for each test site andexposure ti
38、me. In addition, no individual specimen shall havean ellipsoid value of greater than 1.4.6.3 Each specimen shall be of uniform appearance and voidof blemishes, streaks, and splotches. The specimen shall alsobe free of any visual surface or structural changes such aspeeling, chipping, cracking, flaki
39、ng, and pitting when tested inaccordance to Section 5, Procedure for Measuring ColorRetention.D 6864 03ae13ANNEX(Mandatory Information)A1. WASHING WEATHERING SPECIMENSA1.1 Scope:A1.1.1 This procedure describes a practice for washingweathering specimens prior to instrumental color measure-ment. The p
40、rocedure is intended to minimize any effects ofaltering the specimens surface in other than a predictablemanner.A1.2 Equipment:A1.2.1 Mild Detergent, such as Joy, Palmolive, LiquidDawn, or equivalent.A1.2.2 Sponge or soft cloth.A1.3 Procedure:A1.3.1 Flush exposed specimen with water.A1.3.2 Gently wa
41、sh the specimen with a dilute solution(1 % by weight in water, maximum concentration) of a milddetergent using a sponge or soft cloth.A1.3.3 The scrubbing action shall not be excessive and shallbe limited to a back-and-forth motion along the grain orpattern, if one exists.A1.3.4 Avoid circular motio
42、ns.A1.3.5 Rinse thoroughly with clean water to remove anymild detergent residue.A1.3.6 The washed specimen shall air dry and be free of anywater or moisture before conducting color measurements.APPENDIX(Nonmandatory Information)X1. ELLIPSOID VALUE CALCULATIONEXAMPLEX1.1 Example:Initial color reading
43、 of a specimenL 78.0a0.5b8X1.2 Based on the initial color reading, the specimen is incolor region 6, Light Beige.X1.3 Color measurements of the weathered specimen are:Color change due to weatheringDL2.5Da1.1Db 2.4X1.4 Insert the DL, Da, and Db values into the ellipsoidequation for color region 6 to
44、calculate the ellipsoid value forthe observed color change due to weathering.2.5 2 0.0!25.0!211.1 2 0.2!22.6!2122.4 0.3!25.4!25 Ellipsoid Value0.25 1 0.12 1 0.25 5 Ellipsoid Value0.65 Ellipsoid ValueASTM International takes no position respecting the validity of any patent rights asserted in connect
45、ion with any item mentionedin this standard. Users of this standard are expressly advised that determination of the validity of any such patent rights, and the riskof infringement of such rights, are entirely their own responsibility.This standard is subject to revision at any time by the responsibl
46、e technical committee and must be reviewed every five years andif not revised, either reapproved or withdrawn. Your comments are invited either for revision of this standard or for additional standardsand should be addressed to ASTM International Headquarters. Your comments will receive careful cons
47、ideration at a meeting of theresponsible technical committee, which you may attend. If you feel that your comments have not received a fair hearing you shouldmake your views known to the ASTM Committee on Standards, at the address shown below.This standard is copyrighted by ASTM International, 100 B
48、arr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959,United States. Individual reprints (single or multiple copies) of this standard may be obtained by contacting ASTM at the aboveaddress or at 610-832-9585 (phone), 610-832-9555 (fax), or serviceastm.org (e-mail); or through the ASTM website(www.astm.org).D 6864 03ae14
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