If very dry and well set use lemon and salt or the Javelle-water treatment.
"The Complete Home" by Various
An alkaline solution of great use and convenience is Javelle water.
"Public School Domestic Science" by Mrs. J. Hoodless
The Javelle water which they had used was made of bleaching powder and washing soda.
"Common Science" by Carleton W. Washburne
If the paper is of good quality it may be washed with Javelle water, a preparation used in French laundries.
"Library Bookbinding" by Arthur Low Bailey
Javelle water is another household bleach, chloride of lime being the bleaching substance.
"Foods and Household Management" by Helen Kinne