But if the paper was treated first with calcium hydroxide, subsequent bicarbonate treatment was ineffective. Shahani, C.J. and F.H. Hengemihle, 1986. The effect of chelation was also studied. Williams, John C. , C.S. Fowler, M.S. Lyon, and T.L. Merrill, 1977. Metallic Catalysts in the Oxidative Degradation of Paper.
Magnesium carbonate offers better protection against aging than calcium carbonate.
Paper was treated with copper acetate at various pH levels and oven aged. Folding endurance declined more in the humid oven than in the dry oven, indicating that dry-oven aging has little predictive value for oxidate degradation. Wilson, L.P. , 1920. Catalytic Action in the Oxidation of Cellulose. In the viscose process, by which rayon is made, cellulose is gelatinized by oxidizing it in caustic soda, with the aid of catalysts, which are usually oxides or hydroxides of metal which exist in two states of oxidation, e.g., iron, nickel, cobalt, cerium, vanadium or manganese.