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  1. #31

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    Quote Originally Posted by Dave Krueger View Post
    I'm still interested in what you folks have to say about light sensitivity of developers, though. All of the liquid concentrate developers I've used came in non-brown bottles. I think Kodak did use silver plastic bottles years ago, but now they seem to use ordinary (natural) translucent HDPE. So, I'm still curious as to whether there is really any substance behind the recommendation to keep developers in brown bottles.
    Rather than light sensitivity I think it was the bottom line in that brown glass bottles were cheaper than colorless ones. The brown coloration is caused by an iron impurity in the glass. Colorless glass is more expensive because the iron must be removed.
    A rock pile ceases to be a rock pile the moment a single man contemplates it, bearing within him the image of a cathedral.

    ~Antoine de Saint-Exupery

  2. #32
    Dave Krueger's Avatar
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    Thanks, Jerry. I've been using dark bottles, but really would prefer to use clear.

  3. #33

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    A further observation concerning the relative costs of HDPE and PETE. This afternoon I was feeding bottles into the machine at a recycle center and noticed a sign concerning its bulk option. The center pays $0.60 per pound for HDPE and $1.07 per pound for PETE.

  4. #34
    martellsv's Avatar
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    my personal test

    I have a plastic bottle i think is pet bot hdpe, when i fill it with biling degassed water ph drop from 7.3 to 8.7, if i fill it at room temperature ph remains equal 7.3, i read that max temperature usable is 60ºC. thanks but i don't know where is the problem

  5. #35
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    I bought yesterday this bear because of the cap and brown bottle:

    Click image for larger version. 

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    I will store my chemicals in it.

  6. #36

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    Quote Originally Posted by marciofs View Post
    I bought yesterday this bear because of the cap and brown bottle:

    Click image for larger version. 

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    I will store my chemicals in it.
    At the OktoberFest does that bottle come in Kodiak size? It's the biggest bear I know of in a shade of brown The Kodak bear used to be the biggest but it has since shrunk. It is said to be due to its sudden shortsightedness and inability to recognise where its real food was

    pentaxuser

  7. #37
    martellsv's Avatar
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    Polyethylene terphthalate developer

    Then i've got my own Polyethylene terphthalate developer ...

  8. #38
    Truzi's Avatar
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    Marco, I have purchased a couple similar bottles for developers.
    Truzi

  9. #39
    marciofs's Avatar
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    This bottle I bought is only 500ml which is what I usually use since I always develop 1 roll of 120 or 2 rolls of 35mm.

    I have found 2l glass bottle with this type of cap but transparent bottle. If I use it I will paint the bottle.

  10. #40
    Truzi's Avatar
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    You shouldn't have to paint the bottles. Just keep them in a dark cupboard or box.
    Truzi

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