G - Physics – 01 – N
Patent
G - Physics
01
N
31/104
G01N 21/78 (2006.01) G03C 1/73 (2006.01)
Patent
CA 1190040
ABSTRACT OF THE DISCLOSURE A photosensitive composition is disclosed, which is capable of offering a visual, calibrated reaction to the presence of ultra- violet radiation. The composition comprises a complex of a leuco dye and animal-derived serum albumin. The prepara- tion of this complex has been found to stabilize the leuco dyes, to avoid fading after the presentation of a color reaction upon exposure. Also, the leuco dye-serum albumin albumin complex is capable of exacting calibration, so that scientifically significant quantitative measurements of ultra violet light exposure can be made. Moreover, the present com- position eliminates the need for the addition to the leuco dye of various activator compounds, that are chemically unstable, e.g. volatile, or present potential exposure to toxicity, in the instance where personal applications for the photosensitive composition are contemplated. The present invention includes a method of preparing the photo- sensitive composition, including the preparation of an ultra- violet light indicator.
420403
Cerami Anthony
Yamin Michael A.
Bereskin & Parr
Evreka Inc.
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