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  1. #41
    RalphLambrecht's Avatar
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    Quote Originally Posted by MMfoto View Post
    Does anyone here bleach as a standard part of their print process? ...
    I do it on a regular basis. Bleaching and toning makes a big difference.
    Attached Thumbnails Attached Thumbnails Bleach1.jpg  
    Regards

    Ralph W. Lambrecht
    www.darkroomagic.comrorrlambrec@ymail.com[/URL]
    www.waybeyondmonochrome.com

  2. #42
    Bob Carnie's Avatar
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    Yes
    a lot of printers , myself included would do this to lift the highlights.
    Quote Originally Posted by MMfoto View Post
    Does anyone here bleach as a standard part of their print process?

    There's a great Seattle area photographer who's known for "printing down, and bleaching up."

    www.jerrygay.com

    (He won himself a Pulitzer too, btw)

  3. #43

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    Ferricyanide stock

    Will Potassium Ferricyanide keep as a stock solution, in a brown glass bottle?

    I make a 10% Potassium Bromide solution. Could I do the same with the ferri?

    Thanks!

  4. #44
    Bob Carnie's Avatar
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    Marco
    I mix and dump each time, Nymoc will sell the chems in larger containers and it is pretty cheap, the sulphide as well.

    Quote Originally Posted by Marco Buonocore View Post
    Will Potassium Ferricyanide keep as a stock solution, in a brown glass bottle?

    I make a 10% Potassium Bromide solution. Could I do the same with the ferri?

    Thanks!

  5. #45
    RalphLambrecht's Avatar
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    Quote Originally Posted by Marco Buonocore View Post
    Will Potassium Ferricyanide keep as a stock solution, in a brown glass bottle?

    I make a 10% Potassium Bromide solution. Could I do the same with the ferri?

    Thanks!
    From what I can tell, it lasts for a long time (years). I usually make a 1% solution with distilled water, but anyway, dry potassium ferricyanide keeps for decades.
    Regards

    Ralph W. Lambrecht
    www.darkroomagic.comrorrlambrec@ymail.com[/URL]
    www.waybeyondmonochrome.com

  6. #46
    Ian Grant's Avatar
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    My Potassium Ferricyanide (dry crystals) is over 30 years old and still fine, and a 10% stock solution will keep a long time as well.

    Ian

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    Quote Originally Posted by RalphLambrecht View Post
    From what I can tell, it lasts for a long time (years). I usually make a 1% solution with distilled water, but anyway, dry potassium ferricyanide keeps for decades.
    why distilled water?

  8. #48
    Ian Grant's Avatar
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    Quote Originally Posted by StigHagen View Post
    why distilled water?
    Storing such a weak solution distilled is better, however it's more normal to store as a 10% solution, and it all depends on how pure your tap water is if you don't use deionised or distilled water.

    Ian

  9. #49

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    Quote Originally Posted by Ian Grant View Post
    Storing such a weak solution distilled is better, however it's more normal to store as a 10% solution, and it all depends on how pure your tap water is if you don't use deionised or distilled water.

    Ian
    So you store it in 10% solution and then everytime you need to bleach you mix some of it to make a more dilute solution? The more dilute solution to you discard it after use or can it be saved for a prolonged time?

    I have som very dilute solution I mixed a year ago and Im still using it. Is that a problem?

  10. #50

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    I keep 10% ferricyanide and 3.5% potassium bromide solutions on hand and mix equal amounts of them with differing amounts of water to make working solutions of a rehalogenating bleach. The stronger, the faster acting. It's easy to start weak and work up.

    I use small amounts of working solution, so I toss it after use (for example, if I have just a few highlights to do on a print, I start with 10ml of water with 10-20 drops of each stock solution). A liter each of stock lasts a long time

    My stock solutions here in Vienna are going on 6 years and doing fine still.

    BTW, I use the same bleach for SLIMT contractions and for bleach-redevelopment of negatives when I need that.

    Best,

    Doremus Scudder
    www.DoremusScudder.com

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