Paper material that was produced between 1850 and 1980 has a high pH value due to the industrial manufacture of the paper. Because of this, the material decomposes easily.
These special machines for the massive conservation of library, cultural and archival papers and records have the potential to treat up to 70000 sheets a year. The documents are conveyed through the deacidification tank with a special brush system. The documents stay in the solution for approximately 3.5 minutes. During this time the documents are deacidified, an alkaline buffer is built-in and the resizing with methyl cellulose reinforces the paper structure. Effective fixatives prevent colors and inks from fading or bleeding in this water-based process.
After the treatment, any remaining solution is removed by a brush system which then guides the wet documents into the drying unit.
The drying time at approximately 50° is 4 minutes. After leaving the dryer, the documents can be used right away. Speed and temperature are easily adjustable for the deacidification tank and dryer, as well as other operating features.
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