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ERIC Number: EJ1001295
Record Type: Journal
Publication Date: 2012-Jul
Pages: 6
Abstractor: As Provided
Reference Count: 5
ISSN: ISSN-0031-9120
Experimenting with Cameraless Photography Using Turmeric and Borax: An Introduction to Photophysics
Appleyard, S. J.
Physics Education, v47 n4 p423-428 Jul 2012
An alcoholic extract of the spice turmeric can be used to create a light-sensitive dye that can be used to stain paper. On exposure to sunlight, the dyed paper can be used to capture photographic images of flat objects or reproduce existing images through the preferential degradation of the dye in light-exposed areas over a time period of a few hours. The images can be developed and preserved by spraying the exposed paper with a dilute solution of borax, which forms coloured organo-boron complexes that limit further degradation of the dye and enhance the colour of the image. Similar photochemical reactions that lead to the degradation of the turmeric dye can also be used for reducing the organic pollution load in wastewater produced by many industrial processes and in dye-sensitized solar cells for producing electricity. (Contains 1 table and 5 figures.)
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Publication Type: Journal Articles; Reports - Descriptive
Education Level: Secondary Education
Audience: N/A
Language: English
Sponsor: N/A
Authoring Institution: N/A