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OP he Calotype was a positive/negative process introduced in 1841 by Fox Talbot, and popular
for the next ten years or so. Strictly speaking the term refers only to the negative image,
but it is commonly taken to mean both.
A piece of paper was brushed with weak salt solution, dried, then brushed with a weak
silver nitrate solution, dried, making silver chloride in the paper. This made it sensitive to light,
and the paper was now ready for exposure. This might take half an hour, giving a print-out
image. It was fixed in strong salt solution - potassium iodide of hypo.
Entire Thread Subject Posted By Posted cacholong wwh 12/06/02 11:24 PM Re: cafard wwh 12/06/02 11:32 PM Re: cafard/canard Wordwind 12/08/02 10:23 AM Re: cahier wwh 12/07/02 01:42 AM Re: cairngorm wwh 12/07/02 01:48 AM Re: calamander wwh 12/07/02 01:51 AM Re: calamander Wordwind 12/07/02 02:41 AM Re: calligram wwh 12/07/02 02:08 AM Re: calligram Wordwind 12/08/02 10:29 AM Re: calomel wwh 12/07/02 02:13 AM Re: calomel Wordwind 12/08/02 10:31 AM Re: calotype wwh 12/07/02 02:20 AM Re: camber wwh 12/07/02 02:23 AM Re: camber Wordwind 12/08/02 10:33 AM Re: camber Buffalo Shrdlu 12/08/02 11:30 AM Re: camber wwh 12/08/02 02:52 PM Re: cambist wwh 12/07/02 02:26 AM Re: cambist Wordwind 12/08/02 10:35 AM Re: camouflet wwh 12/07/02 02:38 AM Re: campanologist wwh 12/07/02 02:42 AM Re: cacholong Wordwind 12/08/02 10:18 AM
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