Evaluation of Seven Mass Deacidification Treatments
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| Format: | Article |
| Language: | English Slovak |
| ISSN: | ISSN 0034-5806 |
| Online Access: | http://www.viks.sk/chk/res_1_94_1_25.doc |
| Abstract: | Conclusions. The parameters of several methods were modified between the two experimental series. Differences of results are also attributable to the new sampling process. ˙ Wei T'o: the sample treatment of the second series has been realized in accordance with the usual procedure. ˙ Sable: the composition of the solution has been modified. ˙ Bookkeeper: the pilot plant has been modified and the alkaline reserve has been raised. The books of the second group have been treated following the usual procedure. ˙ DEZ: the alkaline reserve is greater. ˙ FMC: there were less problems of ink solubilization due to a modification of the drying length. The solvent has been changed. For all these reasons the results of the two series can not really be compared, besides the fact that the papers tested are different. Table 12 presents the synthesis of both series of tests. It is to be feared that important changes will still take place. The use of Freon will have to be given up one day. FMC and Bookkeeper are modifying their process to do this; at Sable they are looking for another solvent. At the end of our evaluation we propose the following order: DEZ, Bookkeeper> Wei T'o, Sable and FMC Unacceptable: BPA and the Vienna method Before any decision, it will be essential to re-evaluate some of the methods selected the first time according to economic criteria and availability. During treatment it will also be necessary to make controls to check the constant quality of the proposed service. These routine checkups will be made of pH and alkaline measures in test books. Summaries. Seven mass deacidification methods are evaluated after treatment and again after artificial aging. The tests realized on paper of three different compositions determine the physical and chemical effects of deacidification on paper by the measure of color change E*, pH, alkaline reserve, degree of polymerization and copper index. The measure of the color change can also indicate the effect of each method on inks. |
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| ISSN: | ISSN 0034-5806 |
