The documentation (report on preservation and conservation treatment) describes details of the no-longer visible condition prior to and during treatment, and specifies the materials that were used, the chemical treatments, etc., invisible to the naked eye. Because the preferred treatment methods change over time, leaving documentation to future conservators allows them to choose better treatment methods (should treatment be required again), especially as new improved techniques and materials become available. For this reason, documentation is usually retained permanently with the archive documents and not made available to the public. We publish the records here for a better understanding of the flow of the treatment process and the approach to preservation and conservation of archive documents. I would like to express my deep gratitude to the owners who gave their permission to publish the documentation.
	Removal of Degraded and Discolored Varnish Coating from Mounted Educational Charts Antioxidant and stabilization treatment on bound copy books that are severely corroded by irongall ink Removal of overall linings that are dyed with water-sensitive medium from architectural archive documents Leaf-casting treatment for archive documents containing water sensitive ink writings. Treatment of tracing-paper documents from the early 20th century. Example of leaf-casting treatment for archive documents. Example of leaf-casting treatment for archive documents. Conservation and preservation treat-ments for product package materials for tin cans. Example of necessary minimal preservation (basic stabilization), without conser-vation, for the purpose of han-dling and obser-vational research. Examples of various con-servation treat-ments appropriate to architectural drawings and photo-reproduc-tions. Example of staple removal, deacidi-fication and photo-duplication for staple-bound quan-titative corporate documents on acidic paper. Example of a level of repair to allow digital photography and preservation and conservation treatment for long-term preservation of documents with valuable content that had become difficult to open and close from degradation. Example of tape removal, de-acidification and encapsulation for posters stuck with pressure-sensitive tape. Preservation and digitization on a collection of documents deteriorating from flaking of the mounting. Preservation and conservation treatment to repair, digitize and encapsulate a collection damaged from repeated repair.