Effects of Mass Deacidification
All of the processes imparted an adequately high pH in studies conducted by the European Commission on Preservation and Access, the Library of Congress, and a team of scientists from the Centre de Recherches sur la Conservation des Documents Graphiques in the early and mid-nineties. BookKeeper produced a pH of 9-10. CSC Book Saver gives a pH of 8.78-10.5. Wei T'o gives 7.5 to 10.4, and Papersave gives a pH of 7.5-9.
The same studies also found that the processes had negative cosmetic side effects. BookKeeper left "a palpable residue", clamp marks on the covers, and caused some of the colored inks to rub off. CSC Book Saver left a "white powdery deposit" on books. Papersave caused "discoloration, white deposit, Newton rings, bleeding of inks and dyes, odor and different 'feel' of the paper." Wei T'o caused "odor, white residues, rings, cockling, (yellow) discolorations and adhesive bleeding."
However, these studies are now more than ten years old and several of the processes have changed their formulae since the mid-nineties. Conservators from the British Library acknowledge that the existing mass deacidification processes are still developing and further research needs to be conducted on their chemical and mechanical effects. The Library of Congress recommends libraries use mass deacidification to ensure that collections survive. Clearly, the conservators working for the Library of Congress believe that mass deacidification is vital to library collections, whatever the cosmetic effects may or may not be.
Read more about this topic: Mass Deacidification
Famous quotes containing the words effects of, effects and/or mass:
“Virtues are not emotions. Emotions are movements of appetite, virtues dispositions of appetite towards movement. Moreover emotions can be good or bad, reasonable or unreasonable; whereas virtues dispose us only to good. Emotions arise in the appetite and are brought into conformity with reason; virtues are effects of reason achieving themselves in reasonable movements of the appetites. Balanced emotions are virtue’s effect, not its substance.”
—Thomas Aquinas (c. 1225–1274)
“Corporate America will likely be motivated to support child care when it can be shown to have positive effects on that which management is concerned about—recruitment, retention and productivity. Indeed, employers relate to child care as a way to provide growth fostering environments for young managers.”
—Dana E. Friedman (20th century)
“Where mass opinion dominates the government, there is a morbid derangement of the true functions of power. The derangement brings about the enfeeblement, verging on paralysis, of the capacity to govern. This breakdown in the constitutional order is the cause of the precipitate and catastrophic decline of Western society. It may, if it cannot be arrested and reversed, bring about the fall of the West.”
—Walter Lippmann (1889–1974)