953 100 Panduran pen

SKU: 953100
Category: Analyse

953 100 Felt-tip pen with Panduran test liquid Panduran test liquid for the detection of alum sizing of paper and cardboard. Alum sizing is the main cause of premature decay of paper. Panduran is an eriochrome dye that reacts in the presence of aluminum ions (in alum-containing sizing), turning from yellow to blue to violet, thus detecting the alum content of the paper.

29,99 €

incl. 19% VAT , plus (Kleinteile/Stückgut)

Low stock level
Delivery time: 3 - 5 Workdays (DE - int. shipments may differ)

pcs.

Bitte beachten Sie den Mindestbestellwert von 50 €

Description

953 100 Felt-tip pen with Panduran test liquid Since the 19th century, alum in particular has been used for sizing in the machine production of paper and cardboard. This is the main cause of premature paper decay. Panduran is an eriochrome dye that reacts in the presence of aluminum ions (in alum-containing sizing), turning from yellow to blue to violet, thus establishing the alum content of the paper. Panduran is an eriochrome dye that reacts in the presence of aluminum ions (in alum-containing sizing), turning from yellow to blue to violet. This reaction is independent of the pH of the paper under test. Without reaction, the dye remains yellow. Metallization causes it to turn blue to violet. This indicates that the paper was made with alum. A paper or board containing alum is generally not suitable for long-term archiving. A paper or board that is resistant to aging must meet the following quality criteria: - pH > 7.3 acid-free, not containing alum - 100 % cleaned (bleached) cellulose or cotton pulp - 2 - 3 % alkali buffer (e.g. calcium or magnesium carbonate) After several uses of the felt tip pen, it is necessary to clean the felt tip first for retesting. A few strokes on neutral paper will make the test pen fully functional again. The Panduran pen has a shelf life of 24 months if stored in a cool place. Further information such as a legally binding quality guarantee, certificates from independent testing facilities and processing instructions are available on the Internet at klug-conservation.de.