Practice And Science of Standard Barbering a Practical And Complete Course of T
Practice And Science of Standard Barbering a Practical And Complete Course of T
Sidney Coyne Thorpe
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How far should the ultra- violet lamp be kept from the skin? About twelve inches. To prevent irritation and injury to the eyes. 16. Why should the eyes be covered with goggles during exposure to ultra-violet rays? 17. How long should the skin be exposed for the first time? About two or three minutes. 18. For how many minutes can exposure be gradually in- creased? Seven or eight minutes 19. Why should prolonged ex- posure be avoided? May cause severe sunburn and blis- ters 314 REVIEW QUESTIONS A...ND ANSWERS 20. Which degree sunburn safe for customers? is First degree sunburn. 21. What are the signs of first degree sunburn? Slight reddening of the skin, ap- pearing several hours after applica- tion, without any signs of itching, peeling or burning. 22. What causes the skin to tan? The ultra-violet rays stimulate the production of pigment or coloring matter in the skin. 23. Why should the skin be clean before exposure to ul- tra-violet rays? The slightest covering on the skin prevents these rays from reaching the skin.
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