Tsang-Chyi Shiah 1, Han Chien LIN 2 RG/WP#7 5.03/IRG D.

Tsang-Chyi ShiahTsang-Chyi Shiah11, Han Chien LIN, Han Chien LIN22

RG/WP#7 5.03/IRG D

Tsang-Chyi ShiahTsang-Chyi Shiah11, Han Chien LIN, Han Chien LIN22

1 Assistant Professor, Department of Forest Products Science, 1 Assistant Professor, Department of Forest Products Science, NCYU, 300 University Rd., Chiayi 600, Taiwan. NCYU, 300 University Rd., Chiayi 600, Taiwan. E-mail: E-mail: [email protected]@mail.ngyu.edu.tw

2 Associate Professor, Head of Department of Forest Products 2 Associate Professor, Head of Department of Forest Products Science, NCYU, 300 University Rd., Chiayi 600, Taiwan. Science, NCYU, 300 University Rd., Chiayi 600, Taiwan. E-mail:E-mail: [email protected] [email protected]

Laser stain removal of fungus-induced Laser stain removal of fungus-induced stains on paper-based cultural relicsstains on paper-based cultural relics

Laser stain removal of fungus-induced Laser stain removal of fungus-induced stains on paper-based cultural relicsstains 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 brightness improvements in the order of 10Hz,10pulses ; 10Hz,5pulses; 10Hz, 1puls.

◎After removal of fungal stains on the surface of paper specimens, the IR absorbance spectra represent the fungi and amino acid on 1550 cm-1 and 1650 cm-1 respectively, were disappear or decreased obviously.

Conclusions

1.The Nd-YAG laser treated specimens exhibited superior brightness improvements after removal of fungal stains on the surface of paper specimens.

3. No significant difference was detected on the zero span strength of laser treated papers. 4.The Nd-YAG laser can be a viable alternative conservation medium for paper-based of artifacts and archives.