Libraries are confronted with a serious issue: arsenic compounds were sometimes used in the production of 19th century books and journals. We have to assume that Bielefeld University Library may also be affected.
Arsenic is toxic and carcinogenic and can be found in green dyes. Therefore, books from the period with green bindings, book cuts, title labels are generally considered suspect without examination. Leather bindings are not affected.
The first scientific findings have recently become available. However, there are as yet no legal regulations or recommendations for dealing with this threat. We are in dialogue with other libraries.
A possible hazard may arise if the volumes are handled and fingers are moistened with the tongue to turn the pages, if the dust possibly contains arsenic and is inhaled or if arsenic gets into the eyes by touching the volumes. As long as the books are on the shelf, they are considered harmless.
Bielefeld University takes this issue very seriously and has therefore reacted immediately. We ask for your understanding that it will take time to remove books of this size from the collection, store them and check for actual contamination with arsenic-containing colours, as well as to develop balanced regulations for the future use and preservation of such works.
Important: We do not know how many of the 60,000 volumes are actually affected, probably less than 10 per cent. Please take care not to remove old books from the shelves. First check the catalogue to see if the book is blocked.
It is safe to spend time in the library and no protective measures are required.
Books from the publication period 1800-1900 that may be contaminated with arsenic should not be used. However, if handling these books is unavoidable, e.g. because currently borrowed books have to be returned, these protective measures must be observed:
Young people, pregnant women and nursing mothers must not handle books potentially contaminated with arsenic.
Employees of Bielefeld University who have had intensive contact with potentially affected books are recommended to consult the company doctor. Preventive care can be taken advantage of in order to obtain clarity about possible exposure and, if necessary, to minimise damage through early detection. This option is also available to students at Bielefeld University. Library users without university affiliation should contact their family doctor if necessary.