Paper deacidification techniques are discussed with respect to the demands of the restorer: as many acids as possible should be removed; remaining acids should be neutralized; as many harmful products as possible should be removed; and the paper should be impregnated with a substance that would raise the pH up to 8 or 8.5. The various products used or proposed for paper deacidification are evaluated. See also AATA 7-1503, 18-1155, 22-438 for other work on paper deacidification.