Vein-glass

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

Display Mechanism

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.

Persistent Images

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

Control Systems

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.

Osharran Use

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

Formats and Resolution

Vein-glass panels can be manufactured in many sizes, from handheld slates to wall displays. Their resolution depends on the density and reliability of the etched channels. Fine displays require precise fabrication but remain readable in harsh environments where electronic screens would fail.

Practical Applications

Because images persist without power, vein-glass is well suited for signage, medical charts, maps, and records that must survive outages. Updating a panel can be slow compared with an electronic screen, especially when controlled by mechanical templates.

Human Misidentification

Humans initially mistake some vein-glass artifacts for decorative mosaics or static inscriptions. Only after pressure is applied correctly do the channels reveal that the object is a reusable interface rather than a fixed image.