1、Designation: D 211 67 (Reapproved 2006)Standard Specification forChrome Yellow and Chrome Orange Pigments1This standard is issued under the fixed designation D 211; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revision, the year of last r
2、evision. 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 This specification covers six types of commercially purelead chromate pigments as follows:Type IPrimrose Chrome Yellow,Type
3、 IILemon Chrome Yellow,Type IIIMedium Chrome Yellow,Type IVLight Chrome Orange,Type VDark Chrome Orange, andType VIChrome Yellow for Green.1.2 The values stated in SI units are to be regarded as thestandard. The values given in parentheses are for informationonly.1.3 The following hazard caveat appl
4、ies to the test methodportion of this specification only. This standard does notpurport to address all of the safety concerns, if any, associatedwith its use. It is the responsibility of the user of this standardto establish appropriate safety and health practices anddetermine the applicability of r
5、egulatory limitations prior touse.2. Referenced Documents2.1 ASTM Standards:2D 126 Test Methods for Analysis of Yellow, Orange, andGreen Pigments Containing Lead Chromate and Chro-mium Oxide GreenD 185 Test Methods for Coarse Particles in Pigments,Pastes, and PaintsD 235 Specification for Mineral Sp
6、irits (Petroleum Spirits)(Hydrocarbon Dry Cleaning Solvent)D 387 Test Method for Color and Strength of ChromaticPigments with a Mechanical MullerD 523 Test Method for Specular GlossD 562 Test Method for Consistency of Paints MeasuringKrebs Unit (KU) Viscosity Using a Stormer-Type Viscom-eterD 600 Sp
7、ecification for Liquid Paint DriersD 822 Practice for Filtered Open-Flame Carbon-Arc Expo-sures of Paint and Related CoatingsD 1210 Test Method for Fineness of Dispersion of Pigment-Vehicle Systems by Hegman-Type GageE97 Test Method for Directional Reflectance Factor, 45-deg 0-deg, of Opaque Specime
8、ns for Broad-Band FilterReflectometry32.2 Federal Specification:TT-R-266 Resin, Alkyd; Solutions43. Composition and Properties3.1 The pigments shall be chemical precipitates consistingof normal or basic lead chromates, or mixtures of these, with orwithout admixtures of other insoluble compounds of l
9、ead orother materials used in manufacture to control certain proper-ties. The pigments shall conform to the requirements forcomposition as prescribed in Table 1.3.2 The mass color and character of the tint formed bymixture with a white pigment shall be the same as, and thestrength shall be within mu
10、tually agreed upon limits of astandard acceptable to both the purchaser and the seller.3.3 When mutually agreed upon between the purchaser andthe seller as being essential to the end use of the pigment,resistance to loss of gloss, chalking, and color change shall betested as specified in 5.1.4. The
11、exposed panel shall show nochalking, a loss of not more than 30 % of the original gloss,and a color change no greater than the lightness difference. DL,shown for each pigment type in Table 2.4. Sampling4.1 Two samples shall be taken at random from differentpackages from each lot, batch, days pack, o
12、r other unit ofproduction in a shipment. When no markings distinguishingbetween units of production appear, samples shall be takenfrom different packages in the ratio of two samples for each4450 kg (10 000 lb), except that for shipments of less than10 000 lb two samples shall be taken. At the option
13、 of thepurchaser, the samples may be tested separately, or samples1This specification is under the jurisdiction of ASTM Committee D01 on Paintand Related Coatings, Materials, andApplications and is the direct responsibility ofSubcommittee D01.31 on Pigment Specifications.Current edition approved Nov
14、. 1, 2006. Published November 2006. Originallyapproved in 1925. Last previous edition approved in 2002 as D 211 67 (2002).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, ref
15、er to the standards Document Summary page onthe ASTM website.3Withdrawn.4Available from Standardization Documents Order Desk, DODSSP, Bldg. 4,Section D, 700 Robbins Ave., Philadelphia, PA 19111-5098, http:/www.dodssp.daps.mil.1Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Co
16、nshohocken, PA 19428-2959, United States.from the same production unit may be blended in equalquantities to form a composite sample.5. Test Methods5.1 Tests shall be conducted in accordance with the follow-ing test methods. Test procedures not covered by ASTMmethods shall be mutually agreed upon bet
17、ween the purchaserand the seller.5.1.1 Chemical Analysis of Dry PigmentTest MethodsD 126. The lead chromate analysis should be conducted inaccordance with the Procedure section of Test Methods D 126;the procedure outlined in Procedure section is not applicable.5.1.2 Coarse ParticlesTest Methods D 18
18、5.5.1.3 Mass Color and Tinting StrengthTest MethodD 387.5.1.4 Resistance to Loss of Gloss, Chalking, and ColorChange:5.1.4.1 A test enamel shall be prepared consisting of ingre-dients conforming to the applicable specifications in thefollowing proportions:IngredientWeightPercentPigment under test 30
19、 to 34Alkyd resin vehicle solids, minA28Total solids, min 60Mineral spiritsB, CDriersD, E_AAn alkyd resin solution conforming to Type III of Federal SpecificationTT-R-266 is suggested.BSee Specification D 235.CAs required to give a Stormer consistency of 100 to 150 g at 200 r/min asprescribed in Tes
20、t Method D 562.DSee Class B in Specification D 600.EAs required to obtain set-to-touch in 2 h and dry-hard in 8 h.5.1.4.2 The enamel shall have a fineness of grind, asprescribed in Test Method D 1210, of 1.5 mils or less. Applythe enamel to duplicate flat metal panels by spray or applicatorto comple
21、te hiding and allow to dry 72 h. Measure the gloss at60 in accordance with Test Method D 523. Measure thedirectional reflectance of the coating in accordance with TestMethod E97. Subject the coated panels for 168 h to acceler-ated weathering under the conditions prescribed in PracticeD 822. Examine
22、the exposed coating for chalking. Wash theexposed panel under running water with a thoroughly de-greased lambs wool pad to remove scum or dirt. Wipe offwater with clean cheesecloth and dry the panel for 2 h.Calculate the loss of gloss from gloss measurements madebefore and after exposure. After expo
23、sure, determine thedirectional reflectance for each panel as described in TestMethod E97. Calculate the color change or lightness-difference estimate (DL) as follows:DL 5 KY22 Y1! (1)where:Y1= luminous directional reflectance of the panel mea-sured before exposure,Y2= reflectance measured after expo
24、sure, andK = 100 when the reflectances are expressed as decimalfractions or 10 if reflectances are expressed inpercent.The color change for the coating shall be the averageobtained for the two panels.56. Keywords6.1 chrome orange; chrome yellow; lead chromate; orangepigments; pigments; yellow pigmen
25、ts5The method of determining the lightness-difference estimate is described indetail in example 4, “Photoelectric Tristimulus Colorimetry with Three Filters,”Circular C429, Nat. Bureau Standards.TABLE 1 Requirements for CompositionType I Type II Type III Type IV Type V Type VILead chromate (PbCrO4),
26、 min % 50 65 87 55 55 75Total matter soluble in water, max % 1.0 1.0 1.0 1.0 1.0 1.0Total of all substances other than insoluble compounds of lead, max % 8.0 10.0 10.0 10.0 3.0 10.0Moisture and other volatile matter, max % 1.5 1.5 1.5 1.5 1.5 1.5Coarse particles (total residue retained on a 45-m (No
27、. 325) sieve), max % 1.0 1.0 1.0 1.0 1.0 1.0Organic colors and lakes none none none none none noneTABLE 2 Permissible Lightness Difference (DL)Type Pigment DLI Primrose chrome yellow 35II Lemon chrome yellow 8III Medium chrome yellow 6IV Light chrome orange 3V Dark chrome orange 3VI Chrome yellow fo
28、r green 6D 211 67 (2006)2ASTM 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 infring
29、ement 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 standard
30、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 views
31、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).D 211 67 (2006)3
