Magic Crazy Chalk Ron London Vintage Discontinued NOS Use with Slates

Description

One piece of Crazy Chalk developed and sold by Ron London.  This is a vintage item and is no longer availalbe.   It is new and never used.
Effect:  Performer cleans off both sides of a slate with a damp sponge.  The slate is set to the side for a moment.  Upon checking it later, a message has appeared!
This item came from the estate of a home magician.   It includes one piece of boxed crazy chalk and complete instructions.
If you have any questions or need additional photos, please ask before purchasing as I will not accept returns on this item.
Please see our other listings for more magic items from this same magician's estate.   We will be listing more items over the coming weeks.
Thanks.