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Thread: 510 Pyro

  1. #21
    gainer's Avatar
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    Rodinal is noted for how dark it can be and still work like new. I doubt that anyone can tell you exactly how dark that is. It is usually used up before then.
    Gadget Gainer

  2. #22

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    Quote Originally Posted by mikebarger View Post
    I
    Do you guys know if Rodinal or Pyrocat get dark as they age? I know both of these are long keeping too.

    Mike
    Pyrocat-HD mixed in eithr water or glycol does not change much in color with time. If it does become very dark it very likely will have lost some of its working strength.

    Pyrocat-MC, which is only available mixed in glycol, slowly darkens as it ages but this does not appear to have any effect on its working strength. I have a liter bottle that is now three years old and is the color of a light pinot noir. It works as well today as it did when freshly mixed.

    Sandy King

  3. #23
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    The recipe for 510-pyro is pretty short and appears to be economical on ingredients and in use. Pyrogallol, whilst expensive, is available in small quantities from my usual supplier, but not TEA. I have been able to locate a source for 99%, minimum quantity of 500ml, and very expensive (but they will ship free of charge). Adding up the cost of each ingredient, I'd be looking at around £70 for 500ml.

    I can not use that amount within a reasonable period, so...
    Does anyone know of a UK source for a small quantity of premixed 510-pyro ?

  4. #24

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    Paul, TEA is used in all sorts of manufacture, and can be found in unexpected places. It's used in soaps, shampoos, detergents, cosmetics and various other things. I buy mine from a small maker of specialist lubricants for industry (Melbourne, Australia). I take my own container and they give me 5Litre for $20 (Australian dollars that aren't even real dollars). 5L goes a long way.

    TEA can also be used in some other developers (e.g. Ryuji Suzuki's and Pyrocat-MC).

  5. #25
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    Quote Originally Posted by paul_c5x4 View Post
    The recipe for 510-pyro is pretty short and appears to be economical on ingredients and in use. Pyrogallol, whilst expensive, is available in small quantities from my usual supplier, but not TEA. I have been able to locate a source for 99%, minimum quantity of 500ml, and very expensive (but they will ship free of charge). Adding up the cost of each ingredient, I'd be looking at around £70 for 500ml.

    I can not use that amount within a reasonable period, so...
    Does anyone know of a UK source for a small quantity of premixed 510-pyro ?
    I've been looking into exactly the same thing Paul, but the price of raw chemicals for 510 Pyro means I'm quite happy with Pyrocat HD for the time being although I shall be watching this thread with interest.

  6. #26
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    I was having wonderful results with 510 Pyro when I went on hiatus. I don't have much faith that the last batch I mixed is worth messing with so I'd mix some fresh. Looking at my bulk chemistry, everything seems fine except for my pyrogallic acid which has formed a hard clump. Should I grind it up and use it or just replace it? Will the humidity that's gotten to it have ruined it?
    Lorem ipsum dolor sit amet, consectetuer adipiscing elit. In velit arcu, consequat at, interdum sit amet, consequat in, quam.

  7. #27
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    I suggest you make some up and give it a try. I suspect it's fine; however, the mass may be off since it's accumulated some water. Any way you could dessicate it? Maybe one of those silicon packs that ship with electronic equipment?

  8. #28
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    Quote Originally Posted by Tony-S View Post
    I suggest you make some up and give it a try. I suspect it's fine; however, the mass may be off since it's accumulated some water. Any way you could dessicate it? Maybe one of those silicon packs that ship with electronic equipment?
    I could loosen it up first and then toss a desiccant pack in, I suppose.
    Lorem ipsum dolor sit amet, consectetuer adipiscing elit. In velit arcu, consequat at, interdum sit amet, consequat in, quam.

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