Conservation Science

paper fibres, with the main reactive species given in brackets. In order of increasing damage they are: ● alkaline stabilised hy ...

with both aqueous and ethereal peroxide, but the ethereal solution has the advantage that no cockling, swelling of paint or loca ...

48 Chapter 3 8 Accelerated Ageing Tests When conservation treatments are being developed it is desirable to repro- duce the effe ...

typical set of conditions is 80°C and 65% RH for 4 weeks. Usually, there is no attempt to offer an equivalent time for ambient a ...

50 Chapter 3 18–20°C. On exhibition, light levels are recommended to be as low as possible (50–150 lux usually) with no UV or at ...

Paper 51 conservation research work, as they can be used to pull apart and thereby measure the strength of yarns, adhesive joint ...

a hundred folds but very weak papers will only endure a few folds and for these the test is not suitable. 10.2 Chemical Methods ...

Phenylhydrazine is able to react with carbonyl groups to give coloured compounds. Paper sheets can be reacted with this reagent ...

54 Chapter 3 corresponds to the stretching of CH bonds, while a peak at 1740 cm^1 corresponds to a stretching of a carbonyl gr ...

Paper 55 In one of these, the Raspail test, a drop of concentrated sugar solution is added to the paper, blotted off after 1–2 m ...

Chapter 4 Textiles PAUL GARSIDE^1 AND PAUL WYETH^2 (^1) AHRC Research Centre for Textile Conservation and Textile Studies, and T ...

traditional approaches and the application of modern analytical technology, and an appreciation given of their current physical ...

58 Chapter 4 history in Asia and the Central Americas dates back over 7000 years. The spinning of animal fibres into threads and ...

Textiles 59 The sail is 80 ft (24 m) wide at the foot, 55 ft (17 m) in height and weighs somewhere in the region of half a tonne ...

In 2003, the conservators at the Textile Conservation Centre were charged with carrying out first stage conservation, which invo ...

Textiles 61 (2%). Cellulose itself is a polymer built from glucose, although the repeat unit is generally taken as the dimer, ce ...

62 Chapter 4 crystallinity, lacking long-range ordering, and amorphous regions, in which the ordering of the polymer breaks down ...

Textiles 63 of 1,4--(D-galacturonic acid) units, along with some galactose and arabinose; the acid groups are generally present ...

64 Chapter 4 The overall performance of the fibres is dependent on the complete hier- archical structure, from the cellulose pol ...

Textiles 65 such tests are normally destructive and require free specimens, we simply had to take yarn samples from around holes ...