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  #11  
Old 10th December 2022, 07:23 PM
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PanFrank PanFrank is offline
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Welcome and enjoy!
Frank
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  #12  
Old 10th December 2022, 08:07 PM
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Reginald S Reginald S is offline
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Quote:
Originally Posted by Petrochemist View Post
I worked as a summer job, using a repromaster copymaster to make enlargements/reductions of line art using 'photo mechanical transfer'
From researching this transfer I have seen this:

http://printwiki.org/Diffusion_Transfer

Is this what you have done?

The earliest diffusion from emulsion I know is the diffusion from exposed glassplate emulsions to the plate herself which could end in a ghost picture of the former negative seen in the new coated plate.

Reginald
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  #13  
Old 10th December 2022, 08:25 PM
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Quote:
Originally Posted by Reginald S View Post
From researching this transfer I have seen this:

http://printwiki.org/Diffusion_Transfer

Is this what you have done?

The earliest diffusion from emulsion I know is the diffusion from exposed glassplate emulsions to the plate herself which could end in a ghost picture of the former negative seen in the new coated plate.

Reginald
I guess so, I never studied the chemistry of the materials but the description certainly seems to fit my memories. I'd never heard it called diffusion transfer (usually it was just 'PMT')
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  #14  
Old 13th December 2022, 04:44 AM
MattKing MattKing is online now
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Quote:
Originally Posted by Petrochemist View Post
I guess so, I never studied the chemistry of the materials but the description certainly seems to fit my memories. I'd never heard it called diffusion transfer (usually it was just 'PMT')
PMT meant "Photo Mechanical Transfer".
And I last worked with any of that at least 45 years ago!
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