Re: silver nitrate emulsion

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#127

From: B.Rumary
Date: Mon, 19 Jul 1999 00:00

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> i've an old photo that is playing havoc when i scan(microtek x6) it, most of
> the original (so i've been told)is made with silver nitrate and it is this
> that reflects thus making the scan very noisy indeed. i've tried pre-scan
> filtering/descreen etc, post scan fiddling with corel pp9,taking a photo of
> it (dc265) and it still looks shite. can anyone suggest anything please
>
*All* old B&W photos use silver nitrate in the emulsion! From what you say, 
you may have got hold of a Daquerretype (?). This was a very early 
photographic process, which was made on a thin metal plate, and forms the dark 
areas by reflection of light on the metal surface (I think!). Apparently these 
are the very devil to copy, due to the reason you stated.

Brian Rumary, England

http://freespace.virgin.net/brian.rumary/homepage.htm

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From: "B.Rumary" <brian.rumary@virgin.net>
Subject: Re: silver nitrate emulsion
Date: 1999/07/19
Message-ID: <VA.0000092b.00bb6280@brian.rumary>
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