182 JOURNAL OF COSMETIC SCIENCE (a) (b) Figure 7. Thermograph of the tourmaline powder-containing cream. Thermographs were taken at a con- stant room temperature of 25 ø. (a) Thermographed before treatment temperatures of both sides of subjects' faces were almost the same. (b) Thermographs taken 210 seconds after treatment. from 0.6 ø to 1.5 ø. It is suggested that far-infrared rays play a key role in the skin temperature elevation. These results provide a clue for the understanding of wave crystal therapies. Among the jewelries, jade and tourmaline are very effective materials for skin temperature elevation and the acceleration of skin blood circulation, and they show great potential for utilization as cosmetic raw materials.

JEWELRY POWDERS AND FAR-INFRARED RAYS 183 (a) (b) Figure 8. Thermograph of the jade powder-containing cream. Thermographs were taken at a constant room temperature of 25 ø. (a) Thermographed before treatment temperatures of both sides of the subjects' faces were almost the same. (b) Thermographs taken 330 seconds after treatment. ACKNOWLEDGEMENT This work was supported in part by the National Research Laboratory (NRL) program (Project No. 2000-N-NL-01-C-270) by the Ministry of Science and Technology, South Korea.

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