P PAMS - a grade of waste paper, mostly used or unused magazines. Paper Grades - paper is classified into different grades according to the end use, the pulp used and the treatment of the paper. Paper / Board - as a general rule paper/board substances are up to 170 g/m2 - paper, over 170 g/m2 - board. pH Value - a measure of the active acidity or alkalinity of a solution. A value of 7.0 is neutral. Poster Paper - an MG grade with a quick drying surface used for outdoor poster work. The rough underside lends itself to rapid pasting. Primer - coating applied to a material (usually a film or foil) before printing to assist adhesion of ink. Profile - a graph showing the variations in grammage moisture content or other property from point to point on paper web, either across or along the machine direction.
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