1992.28

Pocket slate

Natural (unpigmented) plastic pocket slate; piano hinge on one short side; four (4) lines of twenty-eight (28) braille cells; slight indents in top frame guide placement of stylus; bottom frame cast with six indented holes under each opening in the top frame; three horizontal raised lines on top frame, raised dots divide cells every five columns; raised lip on open end of upper frame facilitates opening; four registration pins up from lower frame fit into holes in upper frame; cast into upper frame, "AMER. PRINTING HOUSE/ FOR THE BLIND/ LOUISVILLE, KY."

H-1.75 W-8.25 D-0.25 inches

ca. 1972

American Printing House for the Blind

Louisville, KY

APH introduced its plastic pocket slate in 1965-66, and produced over 14,000 in that first year. In 1972, the catalog noted that raised ribs had been added to the plastic slate to increase its strength. Mold marks on this item suggest that the plastic was poured below ideal temperature resulting in the stress marks as it cooled. The unpigmented color suggests a prototype or test.

APH Collection, 1992.28