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  1. #1

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    Cleaning chemical storage containers.

    I was just rinsing my 1 gal. plastic jugs (Datatainer"s) when I noticed a bit of dried residue floating to the surface.My usual method of cleaning is to fill,slosh,dump,repeat.Should I be concerned with these chemical remnants? Is there a better way to rinse those containers?
    Thanks Much,
    Mike

  2. #2
    glbeas's Avatar
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    If theres dried crud inside thats not washing loose easily try dropping a few tablespoons of fish gravel into the jug half full of water and agitating vigorously. The abrasion will eventually knock everything loose and won't hurt the plastic or glass.
    Gary Beasley

  3. #3

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    Household bleach and soap will clean off much chemical deposits...rinse thoroughly afterwards.

  4. #4
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    I do it with those effervescent pills which are thought for cleaning dentures

    Horst
    everything becomes more worse. one thing becomes better: the moral becomes more worse.

  5. #5
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    In general, most crud can be cleaned off with a mixture of potassium dichromate and sulfuric acid. This would be about 30% acid and then saturated with the chromate salt. It is not for the faint of heart to use.

    Another good cleaner is potassium hydroxide in isopropyl alcohol. Again, not for the faint of heart.

    Sulfur deposits on containers is removed with concentrated sodium hydroxide solution.

    I know, everyone will go crazy when they read this. Well, the chromate/acid solution was sold for years as tray cleaner in photo shops, and the sodium hydroxide is sold at the supermarket as drain cleaner. No big deal here.

    Just remember, wear rubber gloves and safety goggles when using this stuff. Wash the bottles or trays completely after using these cleaners. I've been using all of these for years with no problems at all. I have clean trays and bottles all of the time.

    PE

  6. #6

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    If you're using bleach make sure no ammonia is in the container. Do any formulas actually use ammonia? Rapid fixer? Or is the form different. Any ways. Don't let it dry on metal either.

  7. #7

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    Those "common" alternatives are most helpful.

  8. #8
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    Yeah, use gloves. The last time I used a dichromate solution for cleaning, I didn't have fingerprints for a week! It was college, and 2 of us had to clean the bottles from the microbiology class. It was the only way to clean them, but gloves would have been smart.

    I normally use the fill, slosh, dump routine, too. Every so often, I use bleach and extra rinses.

  9. #9

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    Fish gravel is too abrasive and will scratch the plastic making it harder to clean the next time. Dry rice is better an won't scratch the plastic. Developer stain is usually soluble in acid solutions. First try a small amount of 28% acetic acid.

    If the bottles are so heavily stained that recourse to anything stonger than household bleach is required then it is best to buy new ones. Chromic acid cleaner is far too dangerous for home use.

  10. #10

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    Muriatic acid is usually 20baume Hydrochloric acid. It's found as driveway/concrete cleaner at home-improvement stores.

    I'm not totally advocating this, but it works well for me. I do wear goggles on my face if i'm really soaking/washing this stuff off of a large tray outside.

    Never tried a chromic acid cleanser. I bet i'm stupid enough to try it :/

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