pH, Sulphates and Chlorides
Smithers Pira carries out pH, sulphates and chlorides testing on paper, board and packaging materials to BS 2924: Parts 1, 3 and 4, and ISO 6588, ISO 9197/1 and ISO 9198.
The determination of pH, water-soluble sulphates and water-soluble chlorides is made by Smithers Pira on paper, board and packaging materials for medical devices which are to be sterilised.
pH is also a factor in the evaluation of the permanence of paper and is referenced in International Standard ISO 9706 covering papers for documents. It can also be a factor in the corrosion of products in contact with paper packaging.
Standards and Accreditation
Smithers Pira testing is UKAS, ISO 17025 accredited to British standard BS 2924: Parts 1, 3 and 4, and International standard ISO 6588, ISO 9197/1 and ISO 9198.