The envelopes in the order shall be uniform with a target brightness of 58 pct for the natural shade paper or as specified by the ordering agency. When a match to a Government color standard has not been specified, the commercial color standard is applicable. Envelope stock shall be uniform and hi-bulk. The dirt count for each side of the paper shall not exceed 250 specks per square meter. Shall be specified by the ordering agency.
Dimensions are inside measurements.