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Posted by Arjun Sen Europe enacted the "Silicosis Law" in 1957, incorporating the Sandblasting Decree. According to this law it was, from then on, forbidden to use material containing more than 1% free crystalline silica for blastcleaning. Silica sand contains much more free silica than 1%, normally in the 80-90%+ range. During blastcleaning, sand particles break down into very small micro-sized particles. Free crystalline particles from sandblasting dust emission, smaller than 5-10 microns (µ) and almost invisible, often stay suspended in the air for a very long time and can consequently be inhaled by blasters or workers engaged in other disciplines in the vicinity. Such particles then become embedded in the lungs, causing scarring of lung tissue which again leads to respiratory problems. This condition can develop into pulmonary silicosis (also called dustlung), a disease, which can be fatal. Trust this adds to the reasons stated earlier in this discourse. Best wishes, A. SEN.
on 8/30/2002, 8:28 pm
Another reason for not using sand as a blasting media is reproduced below.
Consultant, Protective & Functional Coatings
Bombay, INDIA.
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