Gaseous diffusion paper deacidification

Claim 2

The process of claim 1 wherein the morpholine accounts for about 90 to 100 volume percent of the atmosphere surrounding the paper during the impregnation.

Claim 3

The process of claim 3 wherein the paper is in the form of a book.

Claim 4

The process of claim 1 wherein the amount of morpholine impregnated into the paper is sufficient to provide the paper with a pH (measured after the paper has been allowed to stand at room temperature and atmospheric pressure for 24 hours) of at least about 7.6, as determined by soaking one gram of one-eighth inch squares of the paper for one hour in 70 ml. of distilled, deionized water at room temperature and then measuring the pH of the resultant aqueous solution.

Claim 5

The process of claim 5 wherein the paper is in the form of a book.

Claim 6

The process of claim 5 wherein the paper prior to treatment has a pH of about 5.0 or lower.

Claim 7

The process of claim 7 wherein the paper is in the form of a book.

Claim 8

A process of treating a book made of paper having a pH of about 5.0 or lower so as to render the paper resistant to the deterioration that is promoted by acidic conditions, which process comprises impregnating the book with a gaseous atmosphere consisting essentially of morpholine, the said morpholine being present in at least about one-third the volume of said gaseous atmosphere, at about 25* to 75*C. in an amount sufficient to raise the pH of the paper to at least about 8.5, said pH values being as determined by soaking one gram of one-eighth inch squares of the paper for one hour in 70 ml. of distilled, deionized water at room temperature and then measuring the pH of the resultant aqueous solution.

Claim 9

The process of claim 9 wherein the morpholine accounts for about 90 to 100 volume percent of the atmosphere surrounding the book during the impregnation.