| 摘要 |
<p>This invention consists of a progressive tanning system comprising an artificial tanning device or sunlamp, made up of a large number of fluorescent tubes (2,3) which work with mercury vapour and low-pressure discharge. The fluorescent tubes (2,3) are alternated between pairs with a different radiation spectrum, their power varies between 40 and 200 W, and they emit up to 5% ultraviolet B compared to ultraviolet A. The wavelength of the ultraviolet A is between 315 and 400mm while that of the ultraviolet b is between 250 and 315 mm. <IMAGE></p> |
