1、Designation: D211 67 (Reapproved 2012)Standard Specification forChrome Yellow and Chrome Orange Pigments1This standard is issued under the fixed designation D211; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revision, the year of last rev
2、ision. A number in parentheses indicates the year of last reapproval. Asuperscript epsilon () 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 II
3、Lemon 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 asstandard. The values given in parentheses are for informationonly.1.3 The following hazard caveat applies to
4、the test methodportion of this specification only.This standard does not pur-port 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 regulat
5、ory limitations prior touse.2. Referenced Documents2.1 ASTM Standards:2D126 Test Methods for Analysis of Yellow, Orange, andGreen Pigments Containing Lead Chromate and Chro-mium Oxide GreenD185 Test Methods for Coarse Particles in PigmentsD235 Specification for Mineral Spirits (Petroleum Spirits)(Hy
6、drocarbon Dry Cleaning Solvent)D387 Test Method for Color and Strength of ChromaticPigments with a Mechanical MullerD523 Test Method for Specular GlossD562 Test Method for Consistency of Paints MeasuringKrebs Unit (KU) Viscosity Using a Stormer-Type Viscom-eterD600 Specification for Liquid Paint Dri
7、ersD822 Practice for Filtered Open-Flame Carbon-Arc Expo-sures of Paint and Related CoatingsD1210 Test Method for Fineness of Dispersion of Pigment-Vehicle Systems by Hegman-Type GageE97 Method of Test for Directional Reflectance Factor,45-Deg 0-Deg, of Opaque Specimens by Broad-BandFilter Reflectom
8、etry (Withdrawn 1991)32.2 Federal Specification:TT-R-266 Resin, Alkyd; Solutions43.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 lead orother mate
9、rials 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 mutually agreed up
10、on 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 exposed panel sh
11、all 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, or other unit ofp
12、roduction 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 of the1This spe
13、cification 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 June 1, 2012. Published August 2012. Originallyapproved in 1925. Last previous
14、 edition approved in 2006 as D211 67 (2006).DOI: 10.1520/D0211-67R12.2For 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 onthe ASTM
15、website.3The last approved version of this historical standard is referenced onwww.astm.org.4Available from Standardization Documents Order Desk, DODSSP, Bldg. 4,Section D, 700 Robbins Ave., Philadelphia, PA 19111-5098, http:/www.dodssp.daps.mil.Copyright ASTM International, 100 Barr Harbor Drive, P
16、O Box C700, West Conshohocken, PA 19428-2959. United States1purchaser, the samples may be tested separately, or samplesfrom 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
17、. Test procedures not covered by ASTMmethods shall be mutually agreed upon between the purchaserand the seller.5.1.1 Chemical Analysis of Dry PigmentTest MethodsD126. The lead chromate analysis should be conducted inaccordance with the Procedure section of Test Methods D126;the procedure outlined in
18、 Procedure section is not applicable.5.1.2 Coarse ParticlesTest Methods D185.5.1.3 Mass Color and Tinting StrengthTest Method D387.5.1.4 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 specificatio
19、ns in thefollowing proportions:IngredientWeightPercentPigment under test 30 to 34Alkyd resin vehicle solids, minA28Total solids, min 60Mineral spiritsB, CDriersD, EAAn alkyd resin solution conforming to Type III of Federal Specification TT-R-266is suggested.BSee Specification D235.CAs required to gi
20、ve a Stormer consistency of 100 to 150 g at 200 r/min asprescribed in Test Method D562.DSee Class B in Specification D600.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 inTest Method D1210, of 1.5 mils or less.Apply thee
21、namel to duplicate flat metal panels by spray or applicator tocomplete hiding and allow to dry 72 h. Measure the gloss at60 in accordance with Test Method D523. Measure thedirectional reflectance of the coating in accordance with TestMethod E97. Subject the coated panels for 168 h to acceleratedweat
22、hering under the conditions prescribed in Practice D822.Examine the exposed coating for chalking. Wash the exposedpanel under running water with a thoroughly degreased lambswool pad to remove scum or dirt. Wipe off water with cleancheesecloth and dry the panel for 2 h. Calculate the loss ofgloss fro
23、m gloss measurements made before and after expo-sure. After exposure, determine the directional reflectance foreach panel as described in Test Method E97. Calculate thecolor change or lightness-difference estimate (DL) as follows:DL 5 KY22 Y1! (1)where:Y1= luminous directional reflectance of the pan
24、el measuredbefore exposure,Y2= reflectance measured after exposure, andK = 100 when the reflectances are expressed as decimalfractions or 10 if reflectances are expressed in percent.The color change for the coating shall be the averageobtained for the two panels.56. Keywords6.1 chrome orange; chrome
25、 yellow; lead chromate; orangepigments; pigments; yellow pigments5The 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
26、 Type II Type III Type IV Type V Type VILead chromate (PbCrO4), 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.
27、5 1.5 1.5Coarse particles (total residue retained on a 45-m (No. 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
28、 Light chrome orange 3V Dark chrome orange 3VI Chrome yellow for green 6D211 67 (2012)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
29、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 responsible technical committee and must be reviewed every five years andif not revised, either reapproved or withdrawn. Y
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31、ts 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 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959,United States. Individual reprints (single or mu
32、ltiple 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). Permission rights to photocopy the standard may also be secured from the ASTM website (www.astm.org/COPYRIGHT/).D211 67 (2012)3
