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  #31  
Old 21st October 2020, 04:15 PM
Mike O'Pray Mike O'Pray is offline
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Alex I imagine that what may be possible is an enlargement of a 35mm or 120 neg onto the likes of X ray or litho film creating a positive then a contact print of that 8x10 film positive onto another sheet of Xray to create a large neg for use with cyanotype paper

Does this sound right?

The cyanotype website which was given as a link gives fairly detailed instructions for the production of such a negative but yes it involves a clear transparency negative made from a scan

Mike
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  #32  
Old 21st October 2020, 04:21 PM
Michael Michael is offline
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7x5, Alex. I've done lots of them. Nice size for both blueprints and contacts.
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  #33  
Old 21st October 2020, 08:12 PM
alexmuir alexmuir is online now
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I might try to find a 7x5 back for my Horseman camera. I know they made a 10x8, and probably also a 7x5, but they donít appear for sale very often.
I have made 4x5 inter-positives from enlarged 35mm negatives, from which a 4x5 negative can, in turn, be made. Itís quite time-consuming. It might be worth it, however, to go to 5x7, or 8x10, the cost being the film only. Thinking about it, I could actually enlarge 4x5 negatives, which would retain the quality. The original images would have to be good to justify the cost of two large sheets per image. Iím off to investigate suitable film, as I havenít found the alternative route very satisfactory.
Alex


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