For optimum cleaning, dirt is being extracted from the deep structure by means of dry cleaning using a goat-hair brush, gentle compressed air and a museum vacuum cleaner to eliminate the grey bloom and improve the colour effect.
An extended series of tests were carried out on dummies, experimenting with a range of binding agents and fillers in various ratios and using various methods of application. A mixture of cellulose fillers and methyl cellulose as a binding agent proved ideal for stabilizing and closing cracks and areas of loss.
The putty compound is precisely applied using a micro dispenser and fine needle attachments, and the surrounding area is structured accordingly. For deeper loss areas and larger cracks, inlays made of foamed methyl cellulose are first cut to size and inserted before being filled and then retouched.
Restorers: Stefanie Bründler / Kerstin Mürer
Project period: October 2018–May 2019