Advertisement

Removal of Simulated Dust from Water-Based Acrylic Emulsion Paints by Laser Irradiation at IR, VIS and UV Wavelengths

  • M. Westergaard
  • P. Pouli
  • C. Theodorakopoulos
  • Vassilis Zafiropulos
  • Jørn Bredal-Jørgensen
  • U. Staal Dinesen
Part of the Springer proceedings in physics book series (SPPHY, volume 116)

This study aims to investigate whether laser cleaning may be a valuable method for the removal of soiling from water-based acrylic emulsion paints in comparison to traditional cleaning methods. Acrylic-grounded canvas was painted with three different paints (yellow ochre, titanium white and red alizarin) in a polybutyl- acrylate and methyl methacrylate binder. An acrylic binder was used as a reference. The samples were covered with carbon, SiO2 and soot. Cleaning process ablation rate studies were carried out with a Q-switched Nd:YAG laser at 1,064, 532 and 355nm and a KrF Excimer laser at 248 nm. The energy densities varied from 0.03 to 0.69 J cm?2. The irradiated tests at 248nm were monitored by LIBS analysis. On the samples irradiated at 1,064 nm, various analytical methods were carried out. A determined alteration of the titanium white paint resulted in a marked decrease in the glass transition temperature (Tg). Furthermore, discoloration (yellowing) occurred on the binder and the titanium white paint. The ochre darkened slightly but the alizarin was unchanged. When compared with the samples cleaned with water-based solvents, the samples cleaned with laser appeared cleaner. However, SEM/EDX and ATR showed that SiO2 was still present on the surface after laser cleaning at the tested conditions.

Keywords

Laser Cleaning Acrylic Paint Acrylic Emulsion Yellow Ochre Zinc White 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

Preview

Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.

Copyright information

© Springer-Verlag Berlin Heidelberg 2007

Authors and Affiliations

  • M. Westergaard
    • 1
    • 2
  • P. Pouli
    • 3
  • C. Theodorakopoulos
    • 3
    • 4
  • Vassilis Zafiropulos
    • 3
    • 5
  • Jørn Bredal-Jørgensen
    • 1
  • U. Staal Dinesen
    • 1
  1. 1.School of ConservationRoyal Academy of Fine ArtsCopenhagenDenmark
  2. 2.Art Conservation CentreKronborg CastleElsinoreDenmark
  3. 3.Foundation for Research and Technology-Hellas (FO.R.T.H.)Institute of Electronic Structure and LaserHeraklionGreece
  4. 4.RCA/ V&A Conservation, School of HumanitiesRoyal College of ArtUK
  5. 5.Laboratory of Applied Physics, Human Nutrition & DieteticsTechnological Educational Institute of CreteSitiaGreece

Personalised recommendations