How whiteboards are made
The writing surface of a good whiteboard is glass, fused onto steel at more than 1700 °F and shipped in coils.
- stations
- 7
- things upstream
- 74
- raw sources
- 23
- steps from the ground
- 9
The short version
The best whiteboards have a skin of white porcelain enamel, which is powdered glass fused onto thin steel at very high heat. That enameled steel arrives at the board maker in coils. It is cut to size, glued to a fiberboard core with a foil moisture barrier on the back, pressed flat while the glue cures, and wrapped in an aluminum frame.
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Melt the enamel frit
Glass-forming minerals are melted with small amounts of cobalt and nickel compounds, which help the coating grip steel. Quenched, the melt breaks into flakes called frit and milled to a fine powder.
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Coat the steel sheet
Clean steel sheet is coated with the ground frit, often a ground coat first and a white cover coat on top. That steel underneath is also what lets magnets stick to the finished board.
Goes in -
Fire it in a furnace
The coated steel runs through a furnace hot enough to melt the glass powder into a continuous, glossy skin fused to the metal. The cooled sheet is rolled into large coils for shipping.
over 1700 °F
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Cut and glue to core
At the board factory, the coil is unrolled and cut to size, then glued to a core of fiberboard, hardboard or particleboard with hot glue. Steel rollers press out air pockets.
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Back with foil
A sheet of foil or thin galvanized steel is glued across the back of the core. It keeps out moisture that would otherwise swell the wood fibers and warp the board.
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Stack while glue cures
Finished panels are stacked on top of one another so their weight keeps steady pressure on the fresh glue. Once it cures, the panels are trimmed square.
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Fit the aluminum frame
Extruded aluminum trim is cut to length and slipped over the edges, with corner keys or brackets joining the pieces. A marker tray goes on the bottom before packing.
Goes in
Worth repeating
- A mechanical engineer named Avery D. Butler installed a whiteboard in a classroom in Elgin, Illinois, in 1937.
- By the late 1990s only about 21 percent of American classrooms had switched from chalkboards to whiteboards.
- Cheaper melamine boards are a resin-soaked paper over fiberboard, and their slightly porous surface is why old marker ghosts never fully wipe away.
Back to the ground
Follow every input upstream and whiteboard starts as these 23 raw sources.
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Sources
- Whiteboard
- What Are Whiteboards Made Of?
- How Are Whiteboards Made?
- What Are Whiteboards Made Of? From Surface to Backing
- Vitreous enamel
Cite this page: "How whiteboards are made." Assembly Line, 2026-11-03. https://assemblyline.org/make/whiteboard