Colorimetric study of the post-processing effect due to pulsed laser cleaning of paper

• Autorzy: Kamińska A. , Sawczak M. , Ciepliński M. , Śliwiński G. , Kosmowski B.
• Języki publikacji: EN

Abstrakty

EN

The effect of pulsed laser radiation applied for surface cleaning of historical paper samples from the 17th c. and also samples of newly made paper was investigated by means of measurement of the colorimetric parameters: lightness L*, chromaticity C* and yellowness G. For production of the new paper samples the same method and material (linters cellulose) as used in the past were adopted. An artificial sample contamination was simulated by a mixture of charcoal powder with dust. Surface cleaning was performed by means of a Nd:YAG laser (6 ns pulsewidth) at wavelengths from UV, visible, and near IR ranges (355, 532, and 1064 nm). The laser fluence was selected from the range between the ablation and damage thresholds (0.3-0.9 J/cm/sup 2/) of the substrate materials. The absolute differences Delta L*, Delta C* and Delta C indicate that the smallest changes of the original color parameters and the most effective surface cleaning occurred at 532 nm. Artificial aging equivalent to periods of 25 and 50 years resulted in negligible changes of the L* and G values of laser cleaned, laboratory soiled samples, while for non-soiled samples a marked enhancement of the surface darkening with time was observed. Changes in L*, C*, and G after the laser treatment at 355 nm and 1064 nm are ascribed to the photochemical damage of the cellulose fibers and to enhanced absorption of the laser radiation by soil particles.

Słowa kluczowe

EN

laser cleaning; colorimetry

• Wydawca: Oficyna Wydawnicza Politechniki Wrocławskiej
• Czasopismo: Optica Applicata
• Rocznik: 2004
• Tom: Vol. 34, nr 1
• Strony: 121--132
• Opis fizyczny: Bibliogr. 20 poz., rys.

Twórcy

autor

Kamińska A.

• National Museum in Gdańsk, Toruńska 1, 80-822 Gdańsk, Poland

autor

Sawczak M.

• Polish Academy of Sciences, Institute of Fluid-Flow Machinery, Fiszera 14, 80-952 Gdańsk, Poland

autor

Ciepliński M.

• Pulp and Paper Research Institute, Skłodowskiej-Curie 19/27, 90-950 Łódź, Poland

autor

Śliwiński G.

• Polish Academy of Sciences, Institute of Fluid-Flow Machinery, Fiszera 14, 80-952 Gdańsk, Poland

autor

Kosmowski B.

• Gdańsk University of Technology, Narutowicza 11/12, 80-952 Gdańsk, Poland

Bibliografia

• [1] MOROZ R., ROEVER E.A., Restaurator 14 (1996), 172.
• [2] STERLINI P., Paper Conserv. News 76 (1995), 3.
• [3] OCHOCIŃSKA K., KAMIŃSKA A., ŚLIWIŃSKI G., J. Cult. Herit. 4 (2003), 188.
• [4] OCHOCIŃSKA K., SAWCZAK M., MARTIN M., BREDAL-JRGENSEN J., KAMIŃSKA A., ŚLIWIŃSKI G., Radiat. Phys. Chem. 68 (2003), 227.
• [5] KAMIŃSKA A., SAWCZAK M., ŚLIWIŃSKI G., Proc. SPIE 5226 (2003), 382.
• [6] CAVERHILL J., LATIMER I., SINGER B., The Conservator 20 (1996), 65.
• [7] SOARES OLIVIERO D.D., ROSA M. MIRANDA, COSTA JOSE L.C., Appl. Opt. 38 (1999), 6307.
• [8] MULLER-HESS D., TROSCHKE K., KOLAR J., STRLIC M., KAUTEK W., PENTZIEN S., Restauroforum 8 (2001), 604.
• [9] KOLAR J., STRLIC M., MARCINEK M., Appl. Phys. A75 (2002), 673.
• [10] SUREWICZ W., Podstawy technologii mas włóknistych, [Ed.] WNT (Wydawnictwo Naukowo Techniczne), Warszawa 1971, p. 34 (in Polish).
• [11] COOPER M., Laser in Conservation: an Introduction, Butterworth-Heinemann, 1999, pp. 39–57.
• [12] KOLAR J., STRLIC M., PENTZIEN S., KAUTEK W., Appl. Phys. A71 (2000), 87.
• [13] BERGER E., Istoria rozvitia tekhniki masljanoi zhivoposi’, Izdatel’stvo Akademii Khudozhestv SSSR (1961), p. 311 (in Russian).
• [14] ANNIS Z. K., REAGAN B.M., Studies in Conservation 24 (1989), 171.
• [15] SOBICZEWSKA E., MSc Thesis, UMK (Uniwersytet Mikołaja Kopernika), Toruń 1994, p. 6 (in Polish).
• [16] ISO 5630-3:1996 Paper and board-Accelerated ageing-Part 3: Moist heat treatment at 80 degrees C at 65% relative humidity.
• [17] PAULER N., Optyka papieru [Ed.] Instytut Celulozowo-Papierniczy, Łódź 2000, p. 51 (in Polish).
• [18] Felhorski W. , Kolorymetria trójhromatyczna, [Ed.] PWN 1982 (in Polish).
• [19] KAUTEK W., PENTZIEN S., MULLER-HESS D., TROSCHKE K., TEULE R., Proc. SPIE 4402 (2001), 139.
• [20] SZCZEPANOWSKA H., MOOMAW W.R., JAIC 33 (1994), 25.