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Four Line 8 Dot Slate

A four line, 28-cell braille slate that follows the 8-Dot Braille System.

Federal Quota Eligible

Catalog Number: D-19920-ED

Product Description

Traditional braille consists of six dots per cell, but six dots can only represent 64 unique patterns. Braille overcomes this limitation by letting two or more cells represent a single character. Preceding the symbol for a letter, for example, with a dot six makes that letter capital.

It is often desirable, especially in scientific or computer fields, to be able to represent a full character set, like ASCII in a one-to-one correspondence. That is where the 8-dot cell becomes important. With 8 dots to represent a character, you can make 256 unique patterns. APH offers a free file download that allows you to print your own slate on a 3-D printer.


  • Product Type: Braille Learning, Reading and Writing

    Federal Quota Funds: Available

  • Customer Service and Technical Support

    Toll-Free: 800-223-1839 (U.S. and Canada)
    Fax: 502-899-2284
    Hours: Monday–Friday 8:00am–8:00pm EST

  • Contact Customer Service to discuss your warranty options.