I am about to dunk my first monobath ever... 5x7 Arista EDu-100 shot of a doggie...
Stay tuned the Developer is "cooling" to 75. I still think this is daff, but seing it has some history and isn't some "steam punk-hipster" idea of the day, I'm diving in.
We'll that was a strange experience, but great way to do sheet film.
Results... I shot a black and white dog on a white background. They look to be 1 stop under, so rather than 100 I'll rate as 50 next time, I may not have compensated enough for bellows extension either.
Different smells in the darkroom, with the NH3 in the air.
My daughter came in the studio... 2 more 5x7 sheets shot and developed in less than 20 minutes. These look printable.
Still a little thin... gonna rate this at 25ish
Oh what I am doing..
Tray almost no agitation @ 75F
15ml of hc110
50ml NH3 household strength
10ml Ilford rapid fix concentrate
H2O to make 250ml
I do 2 5x7 sheets and toss out... anyone go 3 or 4?
IDK where you got the formula, but I would not use Ammonia in a developer for a modern film. Even the fix you use should be ammonia free. Most people do not know or use this simple guideline.
Ammonia is a fogging agent that also speeds the fixing reaction. It is also a strong base that raises the pH.
Could you use Sodium Carbonate as a strong base rather than the Ammonia?
Originally Posted by Photo Engineer
Most of the formulas I've looked at use sodium hydroxide, which is no longer available at the grocery store, but can be obtained from suppliers of bulk chemicals.
The origin of the monobath formula is Oct. 9, 2004, Donald Qualls posted, in rec.photo.darkroom, the following description of a monobath based on HC-110. It also appears on the covington hc-110 website.
I agree with David. Also, use Sodium Thiosulfate instead of rapid fixers which use Ammonium Thiosulfate.
See the original formulas on page 1 of this thread.
The problem with monobaths is that they must be adjusted for each and every film in order for them to produce useful results. This more than anything else led to their disuse. The Poloroid process of course does not have this problem since the film and monobath are designed for each other.
I got it from the new 55 site.
So PE what do you recommend for EDU Ultra? My negs turned out thin...
Try a developer from page 1 of this thread.