Thirty-five packing workers were collected three times of hand wiping samples: before working, after working, and after washing hands and then randomly selected ten workers to collect hand wiping sample after working by using gloves. The reason why that only packing incense workers were collected the samples because in the questionnaire indicated the packing incense workers contacted dyeing color directly via their hands skin but others workers rarely contacted to dyeing color. Table 2 showed the average heavy metal concentrations (±SD) of the four times sampling. Wilcoxon test was used to compare the average heavy metal concentration between two times of sampling, before and after working by non- using gloves were compared the average heavy metal concentrations, the result was statistically significant difference (p