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SHORT COMMUNICATION
Year : 1991  |  Volume : 57  |  Issue : 4  |  Page : 198

Glass plate and 0.1% copper sulfate solution as filters for ultraviolet B and infrared rays




Correspondence Address:
Ambujam Nandkumar


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How to cite this article:
Nandkumar A, Srinivas C R, Kumar P. Glass plate and 0.1% copper sulfate solution as filters for ultraviolet B and infrared rays. Indian J Dermatol Venereol Leprol 1991;57:198

How to cite this URL:
Nandkumar A, Srinivas C R, Kumar P. Glass plate and 0.1% copper sulfate solution as filters for ultraviolet B and infrared rays. Indian J Dermatol Venereol Leprol [serial online] 1991 [cited 2019 Aug 17];57:198. Available from: http://www.ijdvl.com/text.asp?1991/57/4/198/3676


Psoralens followed by Ultra Violet A rays (PUVA) is effective in the treatment of Vitiligo. Sunlight as a source of UVA though cheap is unpredictable.[1],[2] Some of the less expensive artificial sources of Ultraviolet rays emit UVB and Infrared in addition to UVA. While UVB is responsible for sun burn. infrared is respon­sible for the heat[3] and thus are likely to in­terfere with adequate delivery of UVA. We describe an inexpensive method adopted in one particular case to delete UVB and infra­red rays.

The UV light source was Philips UV lamp. UVB and UVA were measured with UVB LM HOCC and UVA with LMA302 obtained from International Light Corporation; USA. Infrared was measured with a thermometer. A 2mm thick glass filter was used to cut off the UVB and Infrared light output was effectively re­duced by making the light pass through a petridish which contained 0.1% copper sul­fate solution [Figure - 1].[4] UVA, UVB and Infrared rays were measured without and with the fil­ters at a distance of 16 cms from the bulb.

UVA readings were not altered by the filters. Infrared as recorded by thermometer was di­minished by 10° centigrade when CuSo 4 so­lution was used. UVB which was recorded as 2mw/cm2 was reduced to 0.03 mw/cm2 when the glass filter was used.

The above experiment was designed to treat a single case of Vitiligo 3cmsx4cms in size present over left cheek since 4 months. The patient has completed 15 sittings and is presently continuing the treatment. We feel that alterations can be made to suit individual needs and we intend to undertake studies to construct equipments which can be used to treat patients from other sources of ultra vio­let light, namely sunlight.

 
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1.Talwalker PG and Gadgil RB : Diurnal and Sea­sonal variations in long wave Ultraviolet content of Sunlight over the City of Bombay, Ind J Dermatol Venereol Leprol, 1980; 46 : 346-349  Back to cited text no. 1    
2.Srinivas CR, Devadiga R, Rajeev VK et al : Expo­sure time to Sunlight for PUVASOL, Ind J Dermatol, Venereol Leprol, 1989; 55 : 373-374  Back to cited text no. 2    
3.Gange RW : Acute effects of Ultraviolet radiation in the skin, in : Dermatology in general medicine, 3rd ed, Editors Fitzpatrick TB, Eisen AZ, Wolffk et al : Mc Graw Hill book company, New York, 1987; P 1451-1457  Back to cited text no. 3    
4.Frainbell W : Cutaneous Photobiology, First ed, Oxford University Press, Oxford, 1985; P 203-231  Back to cited text no. 4    


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