PDA

View Full Version : Reciprocity Characteristics of Liquid Emulsion



The Stone
06-22-2014, 10:27 PM
Hello,

I have recently begun a body of work using liquid emulsion to make pinhole photographs.

As I usually use sheet film for pinhole photographs I am not sure about the reciprocity characteristics of liquid emulsion or even silver gelatine paper for that matter.

Can anyone recommend a general rule of thumb to help me with a starting point? Obviously it will take some testing but if anyone has any advice I would be quite grateful.

At the moment I am using a bit of old Foma emulsion I had left over but I also have some relatively new Maco emulsion. I'm also going to give AJ-12 a go at some stage.

Thanks alot,

Ben

StoneNYC
06-23-2014, 03:09 AM
I have no insight into liquid emulsions but I have some experience with FOMA100 sheet film and it's reciprocity and it's horrible, worst of all films, so my guess is that their liquid emulsion is no better.

Most manufacturers list that kind of thing in a data sheet, I'm sure someone might have it, try google "name-of-liquid-emulsion reciprocity"
Good luck!

jnanian
06-23-2014, 08:28 AM
hi ben

i would suggest you poke around here : http://www.f295.org/main/showthread.php?4603-paper-negative-reciprocity-failur

that's for regular store bought paper.
liquid emulsions and home brewed stuff might be a little different
so you will have to do a few swatch tests

good luck with your project!

john