1、Designation: D 868 85 (Reapproved 2003)Standard Test Method forEvaluating Degree of Bleeding of Traffic Paint1This standard is issued under the fixed designation D 868; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revision, the year of la
2、st revision. A number in parentheses indicates the year of last reapproval. Asuperscript epsilon (e) indicates an editorial change since the last revision or reapproval.1. Scope1.1 The photographic reference standards that are part ofthis test method2are representative of the degrees of bleedingof t
3、raffic or pavement marking paints. The standards areintended primarily for comparative evaluation in the labora-tory.1.2 Bleeding as defined is the only type of discoloration inthis test method.1.3 This standard does not purport to address all of thesafety concerns, if any, associated with its use.
4、It is theresponsibility of the user of this standard to establish appro-priate safety and health practices and determine the applica-bility of regulatory limitations prior to use.2. Referenced Documents2.1 ASTM Standards:3D 969 Test Method for Laboratory Determination of Degreeof Bleeding of Traffic
5、 Paint2.2 ASTM Adjuncts:D 868 Bleeding resistance of paint (one photo)23. Terminology3.1 Definitions of Terms Specific to This Standard:3.1.1 bleeding characteristicthat condition of discolora-tion manifested in traffic paint when applied to tar or asphaltic-type substrates. The number assigned to e
6、valuate the degree ofbleeding failure represents in these reference standards ameasure of the contrast between the color of the dry film on anonbleeding surface and the color of the dry film on the testsurface.4. Significance and Use4.1 Solvents in a traffic paint may cause bleeding ofpavement const
7、ituents into the traffic marking, thereby render-ing the traffic marking less effective as a lane or directionalindicator. This test method in conjunction with the method forpanel preparation in Test Method D 969 is used to evaluatesuch bleeding properties. The evaluation is very subjective andraise
8、s questions as to the usefulness of the results for specifi-cation compliance.5. Use of Photographic Reference Standards5.1 The photographic reference standards that are part ofthis test method2are representative of the degrees of bleedingof traffic or pavement marking paints. The photograph in Fig.
9、1 is for illustration purposes only and should not be used forevaluation.5.2 The use of the photographic reference standards shownin Fig. 1 should be as follows:5.3 In preparing films to compare with the reference stan-dards for evaluating the extent of bleeding, the paint shall beapplied to:5.3.1 A
10、 nonbleeding reference surface, and5.3.2 The test surface.5.4 The paint under test shall be applied at a film thicknesssufficient to ensure complete hiding.5.5 The contrast in color between the films over the non-bleeding reference surface and the test surface shall be com-pared with the reference s
11、tandards in Fig. 1 for a numericalrating.NOTE 1The degree of bleeding must necessarily be a function of boththe bleeding surface agreed upon and the initial color of the paint. Forinstance, a yellow paint in general would be expected to show lessbleeding than a white paint since its initial color is
12、 darker and as aconsequence the discoloration effect of the bleeding surface upon thisdarker color will be minimized.6. Precision and Bias6.1 PrecisionDue to the poor precision of this testmethod, if it is used in a specification, the permissible deviationfrom the maximum specified value should be a
13、greed uponbetween the purchaser and the seller.6.2 BiasBias cannot be determined.7. Keywords7.1 bleeding test; traffic paints1This test method is under the jurisdiction of ASTM Committee D01 on Paintand Related Coatings, Materials, and Applications and is the direct responsibility ofSubcommittee D01
14、.44 on Traffic Coatings.Current edition approved Dec. 1, 2003. Published December 2003. Originallyapproved in 1946. Last previous edition approved in 1985 as D 868 85 (1998).2Copies of the pictorial photographic reference standards are contained in thepublication Pictorial Standards of Coating Defec
15、ts, and may be obtained fromASTM International Headquarters (order Adjunct ADJD0868) or the Federation ofSocieties for Coating Technology, 492 Norristown Rd., Blue Bell, PA 19422. Theoriginal source of the photographic reference standards illustrated in Fig. 1 is theFederation.3For referenced ASTM s
16、tandards, 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 onthe ASTM website.1Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocke
17、n, PA 19428-2959, United States.ASTM International takes no position respecting the validity of any patent rights asserted in connection 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
18、infringement of such rights, are entirely their own responsibility.This standard is subject to revision at any time by the responsible 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 st
19、andard or for additional standardsand should be addressed to ASTM International Headquarters. Your comments will receive careful consideration 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
20、 views known to the ASTM Committee on Standards, at the address shown below.This standard is copyrighted by ASTM International, 100 Barr 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).FIG. 1 Degrees of BleedingD 868 85 (2003)2
