It's Our Money Too! |
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Solutions
Euro banknotes and Swiss Francs are two examples of currency that uses size as an indicator of denomination.
However, using size to indicate denomination, while possibly the best
solution, is not the only one. Others that have been proposed include:
- Epoxy resin bumps bonded into the paper
- Embossed bumps (Canada)
- Notches, cut corners, and holes*
- Textured paper*
- Intaglio printing (possibly transparent)*
- 3-D watermarks*
* We do not recommend the solutions marked with asterisks. They are neither robust nor effective.
Here is a link to a list of accessible paper currencies of various countries, as of 1995. Note: Since 1995, the Canadian Dollar has been made accessible by touch (and color), and many currencies in Europe have been replaced by the euro, which uses size, color, tactile markings, and large, high-contrast numerals to distinguish between different denominations.
Important Note: It would be a bad idea to put standard braille on paper money.
Many blind and visually impaired people have not had the opportunity
to learn braille. Another reason that braille is a poor choice is that
many people who are blind due to diseases that cause peripheral nerve damage,
such as diabetes, cannot distinguish dots in the standard braille spacing.
Finally, note that unless advanced technologies such as
embedded epoxy bumps
are used, raised bumps tend to rub out quickly.