Explanation/Demonstration of How Foil Graphics are Prepared

Enlarge the figure to an appropriate size for the 11 X 11-1/2 page.
Trace on the back of the enlarged paper figure to reverse the image.
Trace enlarged (reversed) image on back of foil.
Draw the figure on foil in layers (symbols first then the braille dots, then different textured lines, and finally add the texture).
Burnish to define the lines and symbols.
Make air holes, one air hole per braille dot and three or four air holes around each symbol.
Thermoform the master and determine if more air holes are needed.

Source: American Foundation for the Blind Braille Literacy Mentors in Training: The Next Generation - Teaching Special Codes: Nemeth, CBC, and Tactile Graphics - Workshop in Fremont, California (August 7-9, 1997) and Atlanta, Georgia (September 11-13, 1997). Diane Spence and Susan A. Osterhaus

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Last Revision: July 30, 2002

math/foil-tg.htm