Coppper number (abbreviated "Cu#") is a parameter used to evaluate the quality of paper. It indicates the amount of metallic copper generated when paper is mixed with water containing copper sulfate under specific test conditions.
Background
editcopper no. is defined as the no. of grams of metalic copper (as cu2o )
Method of Testing
editUse In Industry
editCopper number may be one of the parameters used when specifying paper. For example, copper number is one of the parameters of the acceptance criteria[1] used by the United States Government Printing Office.
References
editExternal Links
edit[Copper number of pulp, paper, and paperboard , Test Method T 430 cm-09], TAPPI Specification, Retrieved 2009-06-20.