File:Backlit carbon paper.jpg
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Backlit carbon paper scribbled with chemistry pH labwork.
|Source||originally posted to Flickr as "pH"|
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|current||15:33, 20 April 2010||1,024 × 768 (227 KB)||Flickr upload bot||Uploaded from http://flickr.com/photo/67794534@N00/91215456 using Flickr upload bot|
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