SHEET CELLULOSE MATERIAL FOR RESTORATION AND CONSERVATION OF DOCUMENTS Russian patent published in 2018 - IPC D21H11/04 D21H27/00 D21H25/18

Abstract RU 2673848 C1

FIELD: pulp industry.

SUBSTANCE: invention relates to pulp and paper production, in particular the technology of sheet pulp materials – paper and cardboard used for the preservation and restoration of valuable documents. Material is made of paper pulp containing cellulose fiber, subjected to grinding, and auxiliary chemicals: calcium carbonate, aluminum hydroxide, a substance for alkaline sizing. Paper pulp as cellulosic fiber contains sulphate unbleached softwood electrical insulating pulp and sulphate bleached hardwood pulp. Degree of grinding of paper pulp 25–50 °SR.

EFFECT: possibility of developing a practically complete assortment of cellulosic sheet materials necessary to meet the needs of the document conservation system in archival, library and museum collections is provided.

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RU 2 673 848 C1

Authors

Galkina Lyudmila Arsenevna

Levchenko Dmitrij Pavlovich

Dates

2018-11-30—Published

2018-01-23—Filed