If cover a dirty books, they can be wiped with a cotton swab moistened ammonia, Then wipe with a clean cloth and dry. Leather Cover wipe with a cloth dampened with a light soap solution. After drying, cover rubbed with a clean dry cloth.

Grease the pages can derive a solution starch (tablespoon to half a glass of water). When the starch is dry, wash it with a soft cloth.

If a page was stained ink, Soak spot peroxide, Wipe with a damp cotton wool, to pave the top and bottom of the blotters in 2-3 layers and then close the book. “Blotter” absorbs moisture.