American Printing House for the Blind
Tactile Graphics Kit Faccilitates drawing graphics using plastic "papers" (like overheads). The raised image can be easily finger traced.
Indented traces which are produced in raised reverse drawing form can be used where no "formal" raised (like thermoform) is available. Soft pads and tracing tools are available. In an emergency an overhead sheet can be used on a soft surface with a ball point pen.