"Hi Tony. Thanks for that. They were indeed a 1930s product, introduced when Ilford had a Process Department. You can see where this product fits in the 1935 hierarchy here.
I have a little detail on that product but I may get back to you on…"
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Process and Half-tone plates 1895 onwards
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As a part of a wider photo history project I am interested in the characteristics of these type of glass plates, sometimes also produced as flexible films. They were introduced from 1895 but were in…Continue
Started this discussion. Last reply by Alan Hodgson May 31.
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"Hi John,
I have several boxes of Ilford N50 halftone glass plates from quarter plate to 12x16 inch.
I think they are classed as high contrast thin film half tone.
I can open one of the boxes and see if there is any paper info inside if that's…"
"Hi Gareth. Fascinating story. I was 22 years with Ilford and we had similar machinations!
I am in the process of writing a history of Nuclear Emulsions, which starts with Process and Halftone plates around 1900. If you have knowledge of or contacts…"
Process and Half-tone plates 1895 onwards
As a part of a wider photo history project I am interested in the characteristics of these type of glass plates, sometimes also produced as flexible films. They were introduced from 1895 but were in production in various forms for decades.I have some comparisons from the 1890s Journal of the Royal Photographic Society and a little from the BJP. If anyone has manufacturers information in particular I would be keen to hear.See More
"Hi Tony. Give me your email address and I will send you some of Alan E's work on this"
"Hi Alan
Thank you for getting in touch and yes, that's me! I would be happy to discuss this further. This week is a bit hectic but may be next week? It might be easier to arrange things by email and my email address is…"
"Unfortunately the International Standards do not go back that far. ISO Technical Committee 42 (Photography) only started in 1947.
You can coax the listing of standards to only give you the old, withdrawn ones which can be a useful…"
"Hi Roger. An overview of the Curtis Centennial Project appeared in the BJP 06.10.99 pp16-17, followed by a short feature in The Times 11.10.99.
If your French is up to it there was a more detailed article in Le Photographe #1580 in December 2000…"
"Hi Roger. I believe banana oil and bronze powder was used in the past.
When I was at Ilford we did plates for a Centennial version of Curtis' work. We ended up using a gold metallic paint spray. As I recall the services of a motobike fuel tank…"
"Hi Muriel. I had a similar experience with Alan. Although we never met we corresponded and exchanged information on Orotone plates. We wrote an article together and it turned out shared a common background in chemistry. And I got an invite to his…"
"I tried but no availability"
"Hi Patricia. The photo looks like an early (and very robust) drum scanner. It was used to scan a photographic print. There would have been a similar writing system at the other end of the line.
Hope this helps."
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- At 15:29 on February 23, 2021,
Susie Clark said…
Hi Alan
Thank you for getting in touch and yes, that's me! I would be happy to discuss this further. This week is a bit hectic but may be next week? It might be easier to arrange things by email and my email address is susieclarkconservation@gmail.com.
Best wishes
Susie
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