The dissolved dye, incense stick, and hand wiping samples of each small household factory came from the same dissolved dye, which workers mix it every day. The heavy metal concentration of three sample groups were considered the average concentration difference between dissolved dye and incense stick, dissolved dye and hand wiping sample, and incense stick and hand wiping sample. Moreover, the heavy metal concentrations, which were collected from different events, can compare the heavy metal concentrations.