Determining the grade of rosin
Primary source
Verbatim text below is from the Electronic Code of Federal Regulations (eCFR), a public-domain U.S. government work. Always verify the current version with the eCFR before relying on it for any legal matter.
Full Text
The grade of rosin shall be determined by comparing a representative sample, taken and prepared in accordance with the provisions in this part, with the appropriate standard types. The grade shall be the grade designation of the standard type which the sample equals or excels in color, but below the next higher grade.
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