Experimental Study of Nd:YAG Laser Cleaning System for Removing Acrylic Resin and Surface Characteristic

Abstract

Laser cleaning have been found to be a useful cleaning tool to remove contaminants without inducing damage to the substrate and making secondary pollutant. In this study, the effect of Nd:YAG laser cleaning system, emitting at 1064 nm and 532 nm, on acrylic resin applied onto copper coupons and pieces of bronze was investigated. The samples after laser cleaning tests were examined using microscopy, FT-IR, SEM-EDS. As a result, the acrylic resin could be removed from most of the samples at low laser energy density. Laser wavelength 532 nm was more effective than 1064 nm because of using lower laser energy density, which could reduce heat damage to substrates. Although the acrylic resin was easily removed, it revealed melted surfaces and removed bronze patina which must remain. The problems should be solved by future studies using different laser system or laser wavelengths.

The Technology Study on Horse Armor Excavated from Tomb No.8 of the Ancient Tumuli in Marisan, Haman

“…마운팅한 단 면부 분석결과는(Figure 14-MOUNT) 에폭시 수지와 비슷 한 경향성이 확인되어 칠 도막 부분에 대한 분석이 잘되 지 않은 것으로 판단된다. 말 갑옷의 보존처리 강화제로 사용된 Paraloid B-72는 2985 cm -1 부근에서 C-H가 검출되며, 아크릴계 수지 특징 인 C=O이 1717 cm -1 와 1140 cm -1 에서 C-C(=O)-O 피크가 검출된다(Favaro, 2006;Lee and Cho, 2012; NRICH, 2016).이는 유물 표면 추정 칠 도막층과 Paraloid B-72 분석결과 와 유사한 경향성이 확인되어 표면에 칠 도막에 대한 분 석 값보다는 강화제에 대한 분석 값이 검출된 것으로 추 정된다(Figure 14-BULK).…”