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Among bleaching agents available in paper conservation, hydrogen peroxide (HP) is a versatile choice that has many advantages in the removal of discoloration from paper. However, its well-known radical formation in the presence of iron impurities in paper poses the risk of cellulose degradation and color reversion, i.e. return of staining. This study explores a method to diminish undesired HP reactions by adding an additional step using a calcium phytate solution as complexing agent to the recommended treatment sequence. Tests on model papers impregnated with different molar concentrations of iron ions to trace the effects of simulated HP treatments on weight average molar mass, carbonyl group content, and color indicate that the iron phytate complex is sufficiently stable to sustain limited HP bleaching and thereby keeps the iron ions to a certain extent from the reaction system. [ABSTRACT FROM AUTHOR]

The article discusses the decision-making parameters in conservation practice of bleaching paper. It states the two aspects of bleaching which are technical viability of treatment and aesthetic consideration of paper colour. It mentions that in decision-making process, conservator is liable for discussion levels, recognizing issues and making conclusion. It offers parameters of bleaching paper in conservation practice including technical parameters, cultural parameters and value of prognosis.