| 摘要 |
<p>A method is provided of deacidifying books, imaged paper and other imaged material having a cellulose base comprising treating said material with suitable alkaline particles of basic metal oxide, hydroxide or salt dispersed in a gas or liquid in an amount and for a time sufficient to increase the pH of the material and provide an alkaline buffer without impairing the image thereon, said liquid consisting essentially of an inert halogenated hydrocarbon and a surfactant.</p> |
