Iron stains on paper. Can electrophoretic removal become an effective alternative to chemical cleaning?

Abstract

Research in restoration and conservation is directed vs. more sustainable working materials, methods and technologies. Electrophoretic removal, from porous material, of undesired stains due to charged species is theoretically an interesting alternative to chemical cleaning methods, but the lack of specific and comprehensive research work leads to controversial opinions about the efficiency and the needed harmfulness for the treated objects. In this work paper, samples with artificial rust stains were subjected to electrophoretic cleaning treatments in mineral water as electrolyte. Treatments were carried out either in a bath by complete sample immersion between the distanced electrodes or by sample wetting and sandwiching between the electrodes. Evaluation of cleaning efficiency and treatment effects was based on colour change measurements (image analysis of scanned paper samples before and after the treatment and by colorimetric data via spectrophotometric measurements), investigation of morphological changes by SEM observations and folding endurance measurements.

Laser Descaling Area Recognition Method Based on LabVIEW and Machine Vision

“…Some of these methods are costly and not suitable for use in daily maintenance [3][4]. Dissolving and chemical reactions are mostly methods using chemical reagents, which can remove the rust layer well, but the residual waste liquid is difficult to recycle and is very easy to pollute the environment [5][6]. With the development of time, these non-environmentally friendly methods will slowly reduce the utilization rate or even be eliminated.…”