Abstract
Samples of pure cellulose paper (Watman no. 1) were submerged in diluted iron gall ink of a “standard” recipe then treated with aqueous solutions of chemicals that are supposed to inhibit ink corrosion: phytate as a chelating agent to block iron ions, trehalose as an antioxidant and calcium bicarbonate as a deacidification agent. Parameters to evaluate the result were degree of polymerisation and pH. It was found that the combination of chelating agent and/or antioxidant was most effective, while deacidification and antioxidant alone did not give sufficient results. Generally, it is stated that the great variety of iron gall ink recipes and the even greater degree of ink corrosion to be found in historic manuscripts make it nearly impossible to describe exactly in scientific terms, the real state of decay.
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