Paper has properties that are various donate to its performance, the highest of that are pH degree, energy, opacity and whiteness.
Alkalinity and acidity are calculated on a scale referred to as pH scale. Papers with a level that is high of have a tendency to deteriorate quickly. It is because the acids within the paper attack the cellulose fibres and damage their framework. This sort of deterioration causes paper to be really discoloured and brittle. (เพิ่มเติม…)