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Table 3 Exposure level to dust by raw materials – the Iksan Precious Metal Complex Jewelry Processing Company (1999)

From: Systemic sclerosis due to crystalline silica exposure among jewelry workers in Korea: two case reports

 

Crystal

Non-Crystal

 

No. of Personal Samples

Exposure Level (mg/m3)

No. of Personal Samples

Exposure Level (mg/m3)

Total Dust

11

0.642 (0.267–1.841)

38

0.254 (0.045–0.675)

Respirable dust

9

0.219 (0.101–0.388)

18

0.108 (0.010–0.281)

Crystalline silica

9

0.025 (NDa - 0.082)

18

ND

  1. ND not detected
  2. aThe two workers mainly processed cubic zirconia, ruby, sapphires, and sometimes amethyst
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