MDP chalk markers are easy to use water based markers that are a great alternative to traditional chalk. They look better without the mess! They have quick drying bright inks that dry very quickly. These markers can be used on on any non-porous surfaces such as chalk boards or glass.
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INSTRUCTIONS
The first time you use these chalk markers, please shake them for 30 seconds then fully depress the tip for 30 seconds while holding the marker with the tip down. After this period of time you will see the paint flow from the marker and saturate the tip and the marker will be usable. This is required and the markers will not work if you do not do this.
If using these on a blackboard, please test on a small area before using. Some porous blackboards may stain. Vinegar is helpful in cleaning stains.