A sandblasted sign is more compelling than a simple poster.
Sandblasted signs are made from a stenciled design placed on a block of wood or other material that is blasted to carve the design. Powerful blowers create deep lines and texture that reflect light. This results in a dramatic sign that is pleasing to the eye and easy to read.
Sign Blank
A "sign blank" is the shape of the sign to sandblast in the materials you want to use. Redwood and cedar have long been the most popular options for sandblasted signage. More recently high-density urethane, a foam material, has been used to replace natural woods, which are becoming more scarce and expensive. Finishes on urethane have been proven to last longer because the urethane is more resistant to water than wood. Urethane also does not shrink and swell as cedar and redwood often do.
Masking
A sandblasted sign's raised appearance is made by blasting a sign blank that has been covered by a rubber mask, containing the signage design. The areas of the sign to be sandblasted are exposed by removing them from the mask, while the area to remain raised is protected by the mask.
Applying Pressure
The sandblasting process uses cool air that is stored at a high pressure in a tank of sand. The air and sand mixture is forced through a ceramic nozzle. The intense power of the crystals strips the blank, creating deep grooves and lines in relation to the sign design. The area of the sign not being blasted consequently appears raised by comparison.
Priming Finish
After the sign blank has been sandblasted it is often primed with a variety of materials to ensure years of durability. A series of coats is applied to seal the sign and protect it from the elements. After each layer is allowed to dry it is sanded by hand or with a small machine to a smooth finish. Some wooden signs are simply stained with a natural finish.
