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ASTM D1648-86(2020)

(Specification)

Standard Specification for Basic Lead Silicochromate Pigment

Standard Specification for Basic Lead Silicochromate Pigment

ABSTRACT
This specification covers two types of pigment commercially known as basic lead silicochromate. Both types of pigment shall consist of silica coated with lead licates and lead chromates with mass color and character, and oil absorption equal to that of a reference sample as agreed upon by the purchaser and seller. Specimens shall be sampled, prepared, and undergo chemical analysis to test their conformance with specified compositions of lead oxide, chromium trioxide, silica, and moisture and other volatile matter. Materials shall also be tested for ignition loss, specific surface diameter, and particle loss by microscopic methods.
SCOPE
1.1 This specification covers two types of pigment commercially known as basic lead silicochromate.  
1.2 The values stated in SI units are to be regarded as the standard. The values given in parentheses are for information only.  
1.3 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.

General Information

Status
Published
Publication Date
31-May-2020
ICS
87.060.10 - Pigments and extenders
Technical Committee
D01 - Paint and Related Coatings, Materials, and Applications
Drafting Committee
D01.31 - Pigment Specifications
Current Stage
Ref Project

Relations

Replaces
ASTM D1648-86(2014) - Standard Specification for Basic Lead Silicochromate Pigment
Effective Date
01-Jun-2020
Refers
ASTM D1366-86(2019) - Standard Practice for Reporting Particle Size Characteristics of Pigments
Effective Date
01-Oct-2019
Refers
ASTM D1208-96(2019) - Standard Test Methods for Common Properties of Certain Pigments
Effective Date
01-Jun-2019
Refers
ASTM D1844-86(2014) - Standard Test Methods for Chemical Analysis of Basic Lead Silicochromate
Effective Date
01-Dec-2014
Refers
ASTM D1366-86(2012) - Standard Practice for Reporting Particle Size Characteristics of Pigments
Effective Date
01-Nov-2012
Refers
ASTM D1208-96(2012) - Standard Test Methods for Common Properties of Certain Pigments
Effective Date
01-Nov-2012
Refers
ASTM D1844-86(2008) - Standard Test Methods for Chemical Analysis of Basic Lead Silicochromate
Effective Date
01-Jul-2008
Refers
ASTM D1366-86(2007) - Standard Practice for Reporting Particle Size Characteristics of Pigments
Effective Date
01-Nov-2007
Refers
ASTM D1208-96(2007) - Standard Test Methods for Common Properties of Certain Pigments
Effective Date
01-Jun-2007
Refers
ASTM D1844-86(2003) - Standard Test Methods for Chemical Analysis of Basic Lead Silicochromate
Effective Date
01-Dec-2003
Refers
ASTM D1366-86(2003) - Standard Practice for Reporting Particle Size Characteristics of Pigments
Effective Date
10-May-2003
Refers
ASTM D1844-86(1999) - Standard Test Methods for Chemical Analysis of Basic Lead Silicochromate
Effective Date
10-Jul-1999
Refers
ASTM D1366-86(1997) - Standard Practice for Reporting Particle Size Characteristics of Pigments
Effective Date
10-Nov-1997
Refers
ASTM D1208-96 - Standard Test Methods for Common Properties of Certain Pigments
Effective Date
10-Nov-1996
Refers
ASTM D1208-96(2002) - Standard Test Methods for Common Properties of Certain Pigments
Effective Date
10-Nov-1996

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ASTM D1648-86(2020) - Standard Specification for Basic Lead Silicochromate PigmentASTM D1648-86(2020) - Standard Specification for Basic Lead Silicochromate Pigment
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ASTM D1648-86(2020) - Standard Specification for Basic Lead Silicochromate Pigment
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Standards Content (Sample)


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.
Designation: D1648 −86 (Reapproved 2020)
Standard Specification for
Basic Lead Silicochromate Pigment
This standard is issued under the fixed designation D1648; 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.
1. Scope that of a reference sample mutually agreed upon by the
purchaser and the seller.
1.1 This specification covers two types of pigment commer-
cially known as basic lead silicochromate. 3.3 The oil absorption shall be equal, within agreed upon
tolerances, to that of a reference sample agreed upon by the
1.2 The values stated in SI units are to be regarded as the
purchaser and the seller.
standard. The values given in parentheses are for information
only. 3.4 Particle Size:
3.4.1 Type 1—This grade is characterized by major amounts
1.3 This international standard was developed in accor-
of particles in the 6.5- to 28-µm range. Coarse particles
dance with internationally recognized principles on standard-
retained on a 45-µm (No. 325) sieve shall be less than 0.3 %.
ization established in the Decision on Principles for the
Themaximumspecificsurfacediameter(SSD)shallbe8.5µm.
Development of International Standards, Guides and Recom-
3.4.2 Type 2—This grade is characterized by major amounts
mendations issued by the World Trade Organization Technical
of fine-sized particles. In general, the maximum size is
Barriers to Trade (TBT) Committee.
essentially below 1.0 to 2.5 µm. Coarse particles retained on a
45-µm (No. 325) sieve shall be less than 0.1 %. The maximum
2. Referenced Documents
Specific Surface Diameter (SSD) shall be 2.0 µm.
2.1 ASTM Standards:
3.4.3 Where closer control within a grade is required, the
D1208 Test Methods for Common Properties of Certain
fineness requirements shall be as agreed upon by the purchaser
Pigments
and the seller.
D1366 PracticeforReportingParticleSizeCharacteristicsof
Pigments 4. Sampling
D1844 Test Methods for Chemical Analysis of Basic Lead
4.1 Two samples shall be taken at random from different
Silicochromate
packages from each lot, batch, day’s pack, or other unit of
E20 Practice for Particle Size Analysis of Particulate Sub-
production in a shipment. When no markings distinguishing
stances in the Range of 0.2 to 75 Micrometres by Optical
between units of a production appear, samples shall be taken
Microscopy (Withdrawn 1994)
from different packages, in the ratio of two samples for each
5000 kg (10 000 lb), except that for shipments of less than
3. Composition and Properties
10 000 lb two samples shall be taken. At the option of the
3.1 Both types of pigment shall consist of silica coated with
purchaser, the samples may be tested separately or after
lead silicates and lead chromates and shall conform to the
blending in equal quantities the samples from the same
requirements in Table 1.
production unit to form a composite sample.
3.2 The mass color and character of the tint obtained by
5. Test Methods
mixing the pigment with a white pigment shall be the
...

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ASTM  
Method  
Refer-  
Dry Pigments
Sections  
ences  
Moisture and Other Volatile Matter  
6  
D280  
Loss on Ignition  
7  
Coarse Particles  
8  
D185  
Matter Soluble in Water  
9  
D1208  
Organic Coloring Matter  
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Calcium Carbonate (in Venetian Red)  
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Pigment Content  
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D1208  
Moisture and Other Volatile Matter  
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Nonvolatile Matter in Vehicle  
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Moisture by Distillation  
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D1208  
Coarse Particles and Skins  
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D185  
Consistency (Stormer)  
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D562  
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