New to fiber base paper. - Darkroom Techniques Forum

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Q. New to fiber base paper.

Asked by Scott Danner (K=54) on 4/4/2005

I taking an intermediate photography class at Ivy Tech. For the most part we have been using RC paper, but half way throught the semester we changed to fiber base paper. I quickly came to learn that it takes a whole lot more time to print a picture on fiber base paper than it does RC. If I printed a picture on RC paper, lets say 10 seconds @ f8, will that same exposure work for fiber base paper.

Thanks alot

Scott

Nigel Smith (K=3834) - Comment Date 4/4/2005

I had trouble working out which version of this question to reply too :)

Most papers come with a leaflet that shows the 'speed' of the paper. In theory, if the speeds are the same (and have been calculated the same) then the exposures would be the same. In practice, it's not so straight forward. The only RC & FB siblings that I use are Agfa MCP312 (semi matt RC) and Agfa MCC111 (glossy FB) and I'm pretty sure they have the same speed. They do expose pretty much the same BUT the contrast is very different. I find I need 1/2 to 1 grade extra filtration on the FB to get a similar print. Depending on how you're applying that filtration (color head, gel filters, VCCE head, etc) then fine tuning to suit your 'vision' is usually required. SO, the RC print is a fair starting point, but it's never a case of just flipping a piece of FB in the easel after getting a RC print I'm happy with.

Frank J. Schifano (K=52) - Comment Date 5/21/2005

It depends. If your FB paper is the same emulsion as the RC paper you have been using, exposure times will be quite similar. It takes a bit longer for the developer to develop the image and fixing out takes longer as well. This is due in no small part to the fact that the spolutions must penetrate the paper before it can start to do any real work. Washing the print, which takes only a few minutes with RC papers, can take up to 1 hour with FB papers since it absorbs so much fixer.

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