Acid-free products
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1. Acid-free file folder:
It is made of acid-free cardboard and acid-free paper and is bonded with alkaline adhesive. The pH value is determined according to CNS 15444- Method of test for pH of aqueous extracts of pulp, paper and board (Cold extraction method). According to the testing of the third impartial unit (SGS Taiwan Ltd.), the acid-free file folder is alkaline, with a pH of 9.2.
2. Acid-free cover/back cover paper
The pH value is determined according to CNS 15444- Method of test for pH of aqueous extracts of pulp, paper and board (Cold extraction method). According to the testing of the third impartial unit (SGS Taiwan Ltd.), the acid-free cover / back cover paper is weakly alkaline, with a pH of 8.5.