ASTM D8515-23

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: D8515 − 23
Standard Test Method for
Color of Rosin in Solution (Instrumental Determination of
Gardner Color)
This standard is issued under the fixed designation D8515; 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 3. Summary of Test Method
1.1 This test method covers the quantitative determination 3.1 The color of a liquid sample is measured using an
of the color of clear, yellow/brown, liquid materials using color instrument capable of measuring transmitted color and report-
measuring instruments. The results may be invalid if other ing in Gardner colors or in a color system that can be converted
materials are used. The test uses the Gardner color scale to Gardner colors.
described in Test Method D1544. This test method applies to
4. Significance and Use
pine chemical products including tall oil rosin, gum rosin,
wood rosin and related products. 4.1 This test method provides a more precise way of
measuring Gardner color than described in Test Method
1.2 The values stated in SI units are to be regarded as
D1544. It is applicable to rosin products having colors from
standard. No other units of measurement are included in this
Gardner 1 to Gardner 18. The Gardner scale is not applicable
standard.
to materials with colors lighter than 1 or darker than 18.
1.3 This standard does not purport to address all of the
5. Apparatus
safety concerns, if any, associated with its use. It is the
responsibility of the user of this standard to establish appro-
5.1 An instrument capable of measuring transmitted color
priate safety, health, and environmental practices and deter-
and reporting the results in the Gardner color scale described in
mine the applicability of regulatory limitations prior to use.
Test Method D1544. If such an instrument is not available, one
1.4 This international standard was developed in accor-
may be used which is capable of measuring transmitted color
dance with internationally recognized principles on standard-
and reporting in tristimulus values or chromaticity coordinates
ization established in the Decision on Principles for the
using standard illuminant C and the 2° observer, described in
Development of International Standards, Guides and Recom-
Practice E308.
mendations issued by the World Trade Organization Technical
5.2 Glass Cuvets, 10 mm path length, unless a different path
Barriers to Trade (TBT) Committee.
length is specified by the manufacturer, or
2. Referenced Documents 5.3 Glass Tubes, clear. Standard Gardner tubes, as described
2 in Test Method D1544, or other glass tubes designed for a
2.1 ASTM Standards:
specific instrument may be used. Gardner tubes may provide
D1544 Test Method for Color of Transparent Liquids (Gard-
less accuracy than glass cuvets and should be used only when
ner Color Scale)
a decrease in accuracy is acceptable. Glass cuvets should be
E308 Practice for Computing the Colors of Objects by Using
used for referee situations.
the CIE System
6. Calibration and Standardization
6.1 Calibrate the instrument following the manufacturer’s
This test method is under the jurisdiction of ASTM Committee D01 on Paint
recommendations.
and Related Coatings, Materials, and Applications and is the direct responsibility of
Subcommittee D01.34 on Pine Chemicals and Hydrocarbon Resins. 6.2 Test sample preparation for rosin and rosin derivatives.
Current edition approved June 1, 2023. Published June 2023. DOI: 10.1520/
6.3 As most rosins and rosin derivatives are solids, it is
D8515-23
For referenced ASTM standards, visit the ASTM website, www.astm.org, or necessary to introduce a liquid sample into the tube or cuvet.
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
6.4 If the sample is available in molten form follow the
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website. procedure steps in Section 7.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
D8515 − 23
6.5 If the sample is in solid form follow the procedure steps 7.7 Taking care not to touch the measurement area of the
in Section 7. sample cell, fill a clean tube or cuvet with the material to be
tested. If the material is cloudy, first filter it.
7. Procedure
7.8 Insert the glass tube or cuvet in the instrument and
7.1 For a solid rosin sample: open the sample container and
measure the color to the nearest 0.1 of a color grade, following
crack the solid rosin into large pieces. Discard the top one inch
the manufacturer’s recommended procedure.
of the container contents including the dust or finely divided
7.9 Record the Gardner color and report.
particles.
7.2 For a molten rosin sample: please proceed as described
8. Report
below with sample preparation.
8.1 Report the color in Gardner color units to a tenth of a
7.3 Each sample measurement shall be made in d
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