universal scientific library. here they work, among other things , with rare specimens of the 16th century, as well as with maps, posters and others. but somewhere there may be a lost text, maybe these pieces are also all in place we put it in, we definitely check the text, if we have a foreign edition, then we call a specialist if in doubt. before disassembling the book, the restorers take a photo report so that nothing gets confused later during reassembly; the book is returned to the shelf in its historical form. before installing the book , each page undergoes water procedures. paper can be of different types, so an individual composition is selected for it. the water can be filtered. or distilled, the main thing is to observe the temperature regime when washing. no water at all in this case, it should not be either cold or hot; the most optimal is 25-30°. you can’t use tap water either, it contains a lot of impurities that can negatively affect the pages. there is no need to exert any mechanical influence on