Material Cleaning Hints 1. Graphite (Pencils) Wash out with lukewarm water, no cleaning agent. Then wash as ususal 2. Coal/Charcoal For pre-cleaning use lukewarm water with a small amount of natural soap (e.g. ox-gall soap). Then wash as usual 3. Coloured Pencils, Ink, Opaque/Gouache Colours, Watercolours, Powder Colours, etc. Soak in cold water with natural soap for about 1 hour, then rub thoroughly and wash out. If necessary repeat. When there’s only a faded or grey spot wash as usual 4. Acrylic Colours Attention! Stains from acrylic colours have to be removed immediately with cold water and natural soap! Some colours may be unremovable at all. 5. Wax Crayons in clothing Use a hot iron (temperature depending on fabric) and blotting paper to remove waxy stains. Then wash out with warm (not hot!) water and soap. 6. Wax Crayons on the floor Stains from wax crayons on all floors (exception: carpets) can be easiest removed by using white blackboard chalk. Sweep away rests and wash floor with cleaning agent. 7. Chalks, Pastels If possible use a clothbrush for cleaning. Then wash in cold water with natural soap. Repeat if necessary. When there’s only a faded or grey spot wash as usual 8. Fibre Pens, Markers Attention! Stains from fibre pens or markers have to be removed immediately with cold water and natural soap ! If necessary soak in cold water with natural soap for about 1 hour, then rub thoroughly and wash out. Repeat if necessary. When there’s only a faded or grey spot wash as usual. Some colours may still leave slight stains.