Use of test strips to prevent sunburn

Details Use of test strips to prevent sunburn Use of test strips to prevent sunburn

G - Physics

01

J

G01J 1/50 (2006.01) B65D 85/62 (2006.01) G01N 31/22 (2006.01)

Patent

CA 2135819

Test strips with a flat, preferably oblong foil which carries a matrix containing a photoactive chromogenic substance to pre-determine the duration of stay in the sun that is possible without sunburn; a test system for this determination containing a plurality of test strips; and a test strip pack for housing the test strips and supporting individual test strips during use; a method for the pre-determination of the maximum possible duration of stay in the sun without sunburn involves exposing such a test strip to sunlight, comparing the test strip with a reference scale having different colour zones and determining. such duration from the colour zone of the scale which is nearest to the colour of the exposed matrix.

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