ratios.

Discussion in 'The Darkroom' started by darry85, Jan 11, 2018.

  1. darry85

    darry85 TPF Noob!

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    Hello,

    I haven't developed film in a long time and I'm getting back into it, but I'm having a hard time figuring out how the ratios work. The developer I plan on getting is Arista liquid film developer. It says to dilute 1 + 9. So, if I have 500ml of water would that be 100 ml of developer and 400 of water?

    And for the fixer I'm using Arista rapid fixer. it says to dilute 1:4 for film and again with 500 ml of water as an example, 125 ml of fixer and 375 of water?

    I know the + and the : mean something different. I just want to make sure I'm on the right track.


     
  2. darry85

    darry85 TPF Noob!

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    Sorry, I just realized this is in the wrong forum. It goes in the darkroom. Can someone move it for me? Thanks.
     
  3. webestang64

    webestang64 Been spending a lot of time on here!

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    For 500ml total.

    1:4 is one part chem, 4 parts water.......100ml chem 400ml water.

    1:9 is one part chem 9 parts water.......50ml chem 450ml water.
     
  4. darry85

    darry85 TPF Noob!

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    Thanks! I guess there is no difference between the + and the :?
     
  5. webestang64

    webestang64 Been spending a lot of time on here!

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    Just depends on the manufacture how it is listed but yes, no difference.
     
  6. Derrel

    Derrel Mr. Rain Cloud

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    One part developing solution, and then four, equal-to-the-one-part's-volume units of water, is a 1:4 strength developer.

    One part developing solution, then nine, equal-to-the-one-part's-volume units of water is what 1:9 means.
     
  7. limr

    limr Moderator Staff Member Supporting Member

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    No problem, it's been moved. If you ever need something brought to a moderator's attention, you can always use the "Report" link at the bottom of any post, including your own. That way you don't need to wait for someone to notice the request within the thread.
     
  8. jcdeboever

    jcdeboever TPF Supporters Supporting Member

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    Massive Dev chart does it for you. Select volume mixer, enter the developer and the quantity you want to end up with. Simple.

    The Massive Dev Chart
     
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  9. john.margetts

    john.margetts No longer a newbie, moving up!

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    Does a great deal more as well, particularly if you use their app.
     
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  10. jcdeboever

    jcdeboever TPF Supporters Supporting Member

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    I do and it's worth every penny of $8.95.
     
  11. john.margetts

    john.margetts No longer a newbie, moving up!

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    Mine was free.
     

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