Sponge Eraser
Click image to enlarge
This foam sponge can be cut into small pieces and shapes for effective, economical use. Dampen with clean water and rub gently against the surface to be cleaned. Remember this is an eraser (not a sponge). The water is essential to the cleaning action as it helps the eraser to stick to the surface. The sponge weighs 2 grams and it is as light as a feather.
Wash under a running tap (do not squeeze) and let it dry out ready for next time. As is customary with professional conservators a discreet test is advised to ensure the sponge is suitable for the project.