| Summary: | 碩士 === 國立中興大學 === 森林學系 === 85 === Summary
Usually low basis-weight Chinese painting papers are mostly
made from silk or non-wood long fibers which are thinner and
easy to brittle by aging as well. In order to have attractive
appearance and storage convenience, Chinese painting papers are
backed with flax paper cotton fabrics i.e., so called
"mounting". Paste varieties show apparent influence on the
mounting properties and the life of Chinese painting.
The purpose of this study was intended to investigate:(1)the
manufacturing procedures of pastes and their properties
(2)effect of preservatives and cooling on the conservation of
paste varierties (3)effect of commercial preservatives-phenol
and aluminum sulfate on the properties of mounting pastes and
Chinese painting papers.
The experimental results were summarized as follows:
1. For wheat starch, the concentration of starch to water 1:6
in gelatinazation achieved a stable pasting property, but the
gelatinization temperature should not over 80℃.
2. The pH of pastes decreased as prior to wheat starch soaking,
and picking strength decreased as the soaking time (days)
increasing. Besides, the viscosity of diluted liquor increased
as the soaking time increasing.
3. It was apparent that aluminum sulfate has much influence on
brightness, tensile and fold of Chinese painting papers. Phenol
addition resulted in paste color change. In addition, color
change of paste may be inhibited by addition of both of alum
and phenol. No color change occurred while over 2% alum
followed by phenol were added in the paste.
4. There was no significant beneficial effect on the
conservation of Chinese painting papers by the addition of alum
in paste. Besides, sodium benzoic acid, borax and potassium
sorbate addition can not prevent the paste from mould growth,
but benzoic acid and thymol have better mold growth resistance.
5. Alum and phenol-containing commercial pastes are not
available for the conservation of papers. It is apparent to
lessen the paper aging for the use of high pH and viscosity of
paste while NaOH was added. Paste showed the highest viscosity
at pH 7-8. The improved picking strength can be achieved by the
addition of optimum amount of NaOH, MgCO3 and CaCO3 in the
paste, but Ca(OH)2 and Ba(OH)2 were in vain.
6. The improved picking strength and softness of mounted paper
were caused by the addition of preservatives i.e., benzoic acid
and thymol in the paste, nevertheless, there was no apparent
paper strength deterioration occurred.
7. Cold storage make paste preservation available. Cold the
water-covered paste in a cold room will not deteriorate the
properties of the paste and the picking strength of papers, in
addition to this, picking strength can be improved with no
mould growth.
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