delta Delta100

three thoughts. one thing. A film and answers vs my own impulses.

How we get to something else has been a recurring part of my self-questions- those things we pick at between picking apart other things. Forums have strongly structured layouts, they are software impositions upon interaction. Questions seem to have a pattern of responses without regard to the forum goal or forum topic. All self supporting respondents seem to follow a similar pattern.

An instance (from 2017):

an experienced photographer asks: What developer / dilution gives the longest straight line curve on Ilford Delta 100? They have three developers available (TMAX RS, HC-110, D-76)

the response pattern: first response suggests a change in film. Follow-up is ask what the goal of the photographer is. Next, response to follow-ups. Finally, a proposed answer as they use the product.

Reading this 5 year old thread, I had an initial answer; it wasn’t any of the ones given. Why? Probably because I bring the topic a different reason for using the film: I use it as a separation negative component. Separation negatives don’t like compensating effects. No compression, please.

My answer would have been the TMAX RS. That developer isn’t available. The better developer for separations would be DK-50. If you don’t want to work from skratch then use an Ilford ready compound: Microphen.

He seems to have moved onto other matters. his website has a supporting techniques piece as well as a one month blog (2016)

“ that said, most of my contemporaries find this degree of technical application an extraneous exercise, but I find it essential in the process of making art. The accolades once betrothed to the silver saviors of modernism have long-since faded.” [chriswalkerphoto.com/vitae/supporting-techniques/ ]

These found topics hold interest because they may lead to work I would otherwise miss. It also gives me a chance to question my own response system. To monitor my own need to speak up. Save it. If it means enough: write it.

If it really means something: Do that something.

1.13.23 :overnotes

sometimes we break ground to bury something.

until the 70s, photographic processing was an evolving effort, having more myths than method. Not saying that those who hold to myths aren’t ardent. Indeed, they are probably more committed than those prepared to believe beyond their own observation; their method doesn’t stand up under the washing of myth.

modulation transfer is a Kodak term for “sine-wave response”, or “contrast transmission function.”

the emulsion is 3-d … it has depth. developer constituents and agitation methods control exchange of chemistry with the emulstion

Fixing bath capacity. a bath near exhaustion will apparently clear the negative but some of the not-easily soluble salts will remain in the emulsion. Procedure: mix fresh fixer; record time to clear a piece of film; mark that on the processing board for that chemistry. When the time to clear that film approaches double, dump the fixer and remix new.

FT-1 fixer test (hypo check). RST: residual silver test. RHT: residual hypo test.

Tanning developers work by hardening emulsion gelatin more in the exposed areas than in the unexposed, lesser exposed areas. The highlight of the negative hardens more than the shadow. This hardening limits the developing action. Chemicals don’t penetrate as well. There can also be a stain, though the stain isn’t a part of the hardening process. Many developing agents will tan and stain. D175 is an example formula of a generic developer formula that can be used for experiment.


monetary theory. freshwater economics. friedman monetary theory. all need a baseline of start and stop. they fail more times than Greenspan could explain. The internet xboyz use money to further their bullying. they are gingerbread cowards living beyond their meanings.