Sandblasting

Quartz sand (http://maplered.com) was initially used as the preferred abrasive for “sand (http://maplered.com) blasting? but the use of quartz abrasives has been largely prohibited because of the risk of silicosis disorders of the lung. To effectively cut away Material (http://g654.org) , the hardness of the abrasive must be greater than the hardness of the Material (http://g654.org) to be removed. If a surface is only to be cleaned, the hardness of the abrasive must not exceed that of the base Material (http://g654.org) . However, the cutting performance is not only determined by the hardness, but also by the grain size and (http://maplered.com) shape, which also affect the achievable surface roughness.

Abrasives with greater hardness can be used several times. The corundum abrasives frequently used for processing Granite (http://tanbrown.org) can be used for up to 50 cycles in a blasting plant.
Pressure blasting equipment is frequently used for free-hand (http://maplered.com) manual blasting. For making ornaments, the craftsman must be able to move the sand (http://maplered.com) ing nozzle freely and (http://maplered.com) needs an unobstructed view of the workpiece. Chamber-type blasting cabins of sheet metal keep the air free of dust and (http://maplered.com) prevent the abrasive rebounding. The advantage of blasting compared with using chisels is that the Material (http://g654.org) is worked carefully, which avoids chipping and (http://maplered.com) spalling. Particularly thin-walled shapes can be created.

Blasting letters in Stone (http://g603.net) is the oldest use of sand (http://maplered.com) blasting. It requires blastproof stencils for creating sharp edges for the specified shapes. Self-adhesive blasting stencils of special rubber compounds are available for this purpose today. The stencil films are offered in various thicknesses and (http://maplered.com) the thicker films are also called deep blasting films. Deep blasting achieves a relief depth of about 10 millimetres.

Cleaning blasting developed from the need for restoration. This technology permits careful cleaning without damaging the base Material (http://g654.org) and (http://maplered.com) offers high performance at relatively low cost. For example, algae and (http://maplered.com) moss growth can be removed from polished graveStone (http://g603.net) s with soft granules without adversely affecting the polished finish. Special cleaning abrasives include fine Stone (http://g603.net) dust and (http://maplered.com) plastic granules.