Care and cleaning
of green enamelled steel blackboards.
General: Enamelled steel writing surfaces will only last for a long time and stay in good condition if they are cleaned properly.
Initial cleaning: The surface must first be completely covered with white chalk. The chalk is then washed off using a damp cloth or sponge. Then go over the surface with a household or neutral cleaner and, after leaving it a while to work, wash it away again with plenty of water. Any left over water can be drawn off with a squeegee. This initial clean will significantly reduce smearing of the writing surface.
Ongoing cleaning: Always clean the board after it has been used or after a lesson with a well dampened sponge or cloth and then draw off the remaining water with a squeegee. The writing surface should be cleaned again at least once a week using a household or neutral cleaner and washed down with plenty of water. This is especially important if either oil-based chalk or paraffin-based cleaning agents are used. Blackboards should not be dry wiped too often as this leads to more streaks. Aluminium frames must also be dry wiped after the blackboard has been cleaned.
Don't use sharp and/or scouring cleaning agents. Hard limescale/limescale deposits can be removed using warm 10% lemon juice or a vinegar cleaner and rinsing with clean warm water. Marks by made pens, felt-tips, marker pens and the like should be removed before they dry if possible.
Types of chalk: As far as the cleaning, writing, durability and color intensity properties of chalk are concerned VS recommends the following types: Atla Konvex blackboard chalk made by Phytago and blackboard chalk made by Efiskreide. Board markers must not be used on green enamelled steel writing surfaces.
Extremely dirty blackboards should only be treated by a specialist. The best thing to do is to contact VS Service directly in this case.