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  1. #1

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    Rayco Ultra Fine-Grain B&W Negative Developer.

    This formula is closely related to Geoffrey Crawley`s FX-9 and FX-10 developers and is published in a book called RAYCO REVEALS.

    Sodium Sulphite, anhydrous = 100 grams
    Hydroquinone = 6 grams
    CD-4 = 8 grams
    Borax = 4 grams
    Boric acid = 3 grams
    Water to make 1 Litre.

    Develop Ilford FP4 Plus for 8 minutes at 20*C. Other films by test strip and don`t forget to experiment with the formula.

  2. #2

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    Hi Keith, I'm interested in the book you mention, RAYKO REVEALS. Can you tell me more about it? There is a photography center here in San Francisco called Rayko and I wonder if there is a connection to the book.
    Vince Donovan

  3. #3
    Ian Grant's Avatar
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    Rayco or to give the full name Raycolor Ltd was a UK based company based in Farnham, Surrey originally, laterthe business was sold and moved to Lancashire. They began production just after WWII manufacturing electronic timers, voltage stabilisers, etc later moving into photochemistry mainly selling raw ingredients, they had no link with San Francisco.

    Ian

  4. #4

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    Thanks! An interesting coincidence.
    http://raykophoto.com/
    Vince Donovan

  5. #5

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    raycophoto

    what a great resource!! you sf'ers are so lucky!!
    peter

  6. #6
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    Anyone know what "CD-4" is?

  7. #7
    Ian Grant's Avatar
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    CD-4 is a Kodak colour developing agent, it is 4-amino-3-methyl-N-ethyl-N-(2-hydroxyethyl) aniline sulphate, there a many ways to write the name, another is para-hydroxyethylethylamino-orthotoluidine sulphate thta's why it's bestknown as CD-4

    Ian

  8. #8
    Trask's Avatar
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    Hmm... so not readily available from, say, Photographer's Formulary.

  9. #9
    Ian Grant's Avatar
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    I'd be surprised if it isn't, many people make up their own colour chemistry from scratch, CD-4 is Kodak's name but it is available from a variety of manufacturers. Someone should be able to tell you a US supplier (assuming you are in the US).

    Ian

  10. #10
    Blighty's Avatar
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    Quote Originally Posted by vdonovan View Post
    Hi Keith, I'm interested in the book you mention, RAYKO REVEALS. Can you tell me more about it? There is a photography center here in San Francisco called Rayko and I wonder if there is a connection to the book.
    i Have a copy of 'Rayco reveals' plus their other book of photographic formulae. Don't know where I stand on this legally, but I suppose I could scan the book in and send them to you as an attachment via email (as long as I'm not liable to get shafted by anyone!)
    Norman is an island.Time and tide wait for Norman.

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