Calling All Chemists: On 510 Pyro And Diluting The Stock

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chuckroast

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510 Pyro stock is extremely viscous. It can be annoying to use, especially when trying to measure small amounts that then don't easily drain out of the measuring cylinder. I realize syringes are possible, but that too is a very slow process.

So ... I mixed my remaining stock 1+3 with Glycol to thin it a bit, on the theory that the glycol would inhibit oxidation much as the TEA does. I thus made a stock solution that is at 25% strength.

I simply then use 4 times as much of it when making working developer - say, 20ml in a 500ml run as opposed to the 5ml a 1:100 solution would call for from full strength stock,

Does anyone have a point of view on whether this fundamentally alters the behavior of the developer? That is to say, does diluting a TEA-based stock with glycol in any way undermine the developer's action? Does adding glycol at room temp mix well with the TEA, for instance?

My first few rolls this way look fine, BTW, I am just curious if there is something afoot I should know about.

TIA,
 

Andrew O'Neill

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Well, if you call mixing up known recipes, and dabbled in dilutions, then I guess so...
I recall that I got a D in grade 11 chem, and a mercy pass from the teacher in chem 12 😁 I regret not paying more attention and putting more of an effort in, but at least I got an A in both biology and physics. 😆
 
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chuckroast

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Well, if you call mixing up known recipes, and dabbled in dilutions, then I guess so...
I recall that I got a D in grade 11 chem, and a mercy pass from the teacher in chem 12 😁 I regret not paying more attention and putting more of an effort in, but at least I got an A in both biology and physics. 😆

My senior year, my HS offered Organic Chemistry for the first time. For our final project, we split into team to do various organic experiments. I don't recall what my team did, but one of my buddy's team made ethanol. We drank after we graduated and had our certificates in hand. It was very strong :wink:

Even though I did well in math and science, the passing of the years has caused sufficient bit rot that I don't recall a whole bunch of the material, though I still recall that F=MA and Avagadro was a mole...
 

Alan Johnson

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Gainer suggested using Glycol to dilute PC-TEA. It would be surprising if there were any problems with what is proposed in post 1.
 
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chuckroast

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Gainer suggested using Glycol to dilute PC-TEA. It would be surprising if there were any problems with what is proposed in post 1.

Yeah, that was kind of my expectation as well.

If you look at this month's MSA, I just posed a couple film scans of the resulting negatives, which seem fine to me.

(Normally, I hate posting film scans because I like the look of the print and its scan much more, but the MSA runs out tomorrow, so ...)
 
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