Manual sandblasting

Denim factories typically employ one of two major methods to weather their denim: manual or mechanical sandblasting. Manual sandblasting, which is favored by garment-producing countries in the global South, is performed by workers who use air guns to fire sand at fabric under high pressure, often in the absence of adequate ventilation. If inhaled, the silica dust can cause severe respiratory problems for workers, even resulting in fatal diseases such silicosis and lung cancer in cases of intense or long-term exposure.
Source Ecouterre article on the dangers of manual sandblasting. Published July 2013.
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