Vein-glass

Vein-glass is a reusable display panel made from laminated glass and ceramic layers etched with microscopic channels called veins.

Each pixel is a tiny cell that can be filled with dark pigment or cleared. A brief pressure pulse from a pump, bellows, or accumulator routes pigment into selected cells to make them black. A second pulse sends a clear wash through the same paths to erase the image.

Once set, the image holds without continuous power because the pigment is trapped by capillary thresholds in the cell geometry.

Vein-glass does not require modern electronics because nothing is switched by semiconductors or transistors. Control is handled by plumbing, valves, and physical programs such as manifolds, keyed plates, or simple valve consoles that route pressure to different channel bundles.

The Osharré treated vein-glass as fieldcraft and materials work: pressure, flow, seals, and timing, with no circuitry and no computation theory required.