Transcript RG/WP Poster presenters

Tsang-Chyi SHIAH1, Han Chien LIN2
Laser stain removal of fungus-induced
stains on paper-based cultural relics
1 Assistant Professor, Department of Forest Products Science,
NCYU, 300 University Rd., Chiayi 600, Taiwan.
E-mail: [email protected]
2 Associate Professor, Head of Department of Forest Products
Science, NCYU, 300 University Rd., Chiayi 600, Taiwan.
E-mail: [email protected]
Preservation of cultural relics
Paper-based
Cultural Properties
Laser stain removal of fungus-induced
stains on paper-based cultural relics
• Aim of work
The aim of this study is to investigate the
feasibility of mouldy paper removed by using
Nd-YAG (neodymium-YAG) laser. Artificial
stained paper prepared from infesting with
fungi was removed by laser treatments, in
order to find out the suitable treated condition.
Results
◎To running at 1064 nm of laser wavelength obtained
superior cleaning, especially for the results to the black
and /or darken fungal stains.
◎The Nd-YAG laser treated specimens exhibited superior
improvements of brightness in the order of 10Hz with
10pulses, 10Hz with 5pulses, 10Hz with 1puls.
◎After removal of fungal stains on the surface of paper
specimens, the IR absorbance spectra represent the
amino acid of fungi and carbonyl group at 1550 cm-1 and
1650 cm-1 respectively, were disappeared or decreased
obviously.
Conclusions
1.The Nd-YAG laser treated specimens
exhibited superior improvements of brightness
after removal of fungal stains on the surface
of paper specimens.
2. No significant difference was detected on the
zero span strength of laser treated papers.
3.The Nd-YAG laser can be a viable alternative
conservation medium for cleaning of paperbased of artifacts and archives.
Thanks for your
comments and suggestions