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  1. #11
    Mainecoonmaniac's Avatar
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    Now I feel guilty

  2. #12

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    I wouldn't worry about it. In fact, I don't. Those products are no longer available. I don't think my remaining can and what's left of your 30 year old one is going to do any appreciable harm. It's already packaged, so we might as well use it.

    I guess we could take it to our local hazardous waste disposal site ... but that's just going to an extreme, IMO.

  3. #13
    Mainecoonmaniac's Avatar
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    Thanks! I use is sparingly because Beseler doesn't make it any more. For good reason.

  4. #14
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    Once you run out of CFC, try butane (lighter refill). Slightly heavier than air but you still need to give a good blast to expel all the oxygen.

  5. #15

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    diflouroethane is a common one as is tetraflouroethane there is flouromethane as well. tetraflouroethane is another common one, the 'ice' smoke is quite harsh with this one which tells it apart, it displaces oxygen so it should be as effective as it wont react with the chemicals most of them are relatively inert.

  6. #16

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    jm94, I have been reading up on "canned air". It seems that people were huffing the stuff and some were dieing, so now bitterants are added to the products to dissuade people from doing that. Apparently the bitterants make huffing intolerable. If you use canned air to displace oxygen, you are also adding these unspecified compounds. One would need to know what bitterant is added to determine the effect on your developer.

    Another thing I found out is that "canned air" is also a refrigerant. Difluoroethane (HFC-152a), trifluoroethane (HFC-143a), or tetrafluoroethane (HFC-134a). These are supposedly potent greenhouse gases, so even though they don't deplete ozone, there is still ample reason for some people to feel guilty using them. Thankfully, I'm not one of them.

  7. #17
    Athiril's Avatar
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    What paper? Many have developer built in and only need sufficient ph to develop.

  8. #18

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    Ilford MGIV - Multigrade IV RC Deluxe, MGD.1M. Purchaed in 2004, I believe. I used most of it at the time I bought it, but I had about a dozen sheets left in the box, so I figured I'd experiment with paper negatives.

  9. #19
    Athiril's Avatar
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    That will develop in alkali solution without developer (or dead developer) but probably not to maximum black.

    Put a piece of film in room light in a small sample of either, that'll confirm developer activity.

  10. #20

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    I'll try that. Thanks Athiril. I did not know that some papers had developers incorporated.

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