Rayco Ultra Fine-Grain B&W Negative Developer.

Keith Tapscott. · Apr 22, 2009

Keith Tapscott. submitted a new resource:

(there was a url link here which no longer exists) - 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.

(there was a url link here which no longer exists)

vdonovan · Apr 27, 2009

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.

Ian Grant · Apr 27, 2009

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

vdonovan · Apr 27, 2009

Thanks! An interesting coincidence.
Dead Link Removed

Peter Schrager · Apr 27, 2009

raycophoto

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

Trask · Apr 28, 2009

Anyone know what "CD-4" is?

Ian Grant · Apr 28, 2009

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

Trask · Apr 30, 2009

Hmm... so not readily available from, say, Photographer's Formulary.

Ian Grant · Apr 30, 2009

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

Blighty · May 7, 2009

vdonovan said:
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!)

Les · May 13, 2009

I would like to see a copy as well if you wouldn't mind. Thanks, Les

vdonovan · May 23, 2009

Same here. The folks at the Rayko center here would get a kick out of it, and maybe even start a project around it.

Rayco Ultra Fine-Grain B&W Negative Developer.

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