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Experimental work on chemical bleaching using aqueous solutions of sodium percarbonate (2Na 2 CO 3 · 3H 2 O 2 ) suggests its viability as a new method for bleaching discoloured paper. The choice of this product is due to the chemical stability of the solid percarbonate reagent as compared with...
The inks used in Arabic manuscripts written between the 11th and 17th centuries and belonging to the archive of the Sacromonte Abbey in Granada, Spain, were studied. The constituent materials were determined with DRX, SEM/EDX, FTIR, HPLC and EC analytical methods. The results obtained coincide...
The photochemical stability of lignocellulosic and purely cellulosic paper deacidified with five dispersions of Ca(OH) 2 and Mg(OH) 2 nanoparticles in alcohols was studied. The hydroxide particles were produced either by “slaking” of CaO in an appropriate aqueous solution (two dispersions) or...
The aim of this research was to study two methods for humidification and flattening of positive prints on albumen paper, and to evaluate the impact of each treatment on the surface characteristics of the albumen. The research was undertaken at Library and Archives Canada and supported by the...
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