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Photorealistic dark amber-brown master index card with a taxonomy grid, holes, notches, and white text on a grey grid surface.

Photorealistic dark amber-brown master index card with a taxonomy grid, holes, notches, and white text on a grey grid surface.

A finished Model RAIS-082 Master Index Card is a rigid, 6.000 x 4.000 inch dark amber-brown rectangle of compressed bamboo-resin bioplastic (1.50 mm thick) featuring a smooth face overlaid with a white lithographic taxonomy grid and the deep, debossed alphanumeric tracking code `RAIS-RE-0142` backfilled with permanent white ink. Its perimeter holds 50 pre-drilled 2.50 mm holes inset 0.250 inches from the moisture-proof edges, with select data fields cleanly sheared open into 3.5 mm wide by 6.35 mm deep U-shaped mechanical notches that give the card a distinct, gear-like profile. Mehr sehen