Do Lens transmit UV to expose sensitized film gelatin for collotype and how to do

Mustafa Umut Sarac

Member

Joined

Oct 29, 2006

Messages

4,829

Location

İstanbul

Format

35mm

• Jul 26, 2015

• #1

• Do Common Lens transmit enough UV to expose common film sensitized gelatin for collotype ?
• Do UV transmit ability varies from lens to lens ?
• I read normal lens transmit long uv, does it work ?
• Can I sensitize normal may be 120 bw film roll complete gelatin for uv transmitted from ordinary lens ?
  How to do ? I remember one dichromate subsitute sold at apug , does it work ?

I dont have quartz and not thinking pinhole.

Umut

 

Gerald C Koch

Member

Joined

Jul 12, 2010

Messages

8,131

Location

Southern USA

Format

Multi Format

• Jul 26, 2015

• #2

Optical glass has limited transmission for UV radiation. The following article has some useful graphs. http://www.dpreview.com/forums/post/53801834

 

Nodda Duma

Member

Joined

Jan 22, 2013

Messages

2,685

Location

Batesville, Arkansas

Format

Multi Format

• Jul 26, 2015

• #3

Optical glass transmits 350-400 fine but the images may be softer due to less efficient aberration correction and slight focus shift.

Below that, your choices are more limited.