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-   -   Ilford Bromophen formula ? (http://www.film-and-darkroom-user.org.uk/forum/showthread.php?t=5229)

GeorgeGiralt 21st December 2011 06:03 AM

Ilford Bromophen formula ?
 
Hello !
I'm a big fan of this paper developer because it gives cool tones on my favourites papers.
And, I'm been given a whole bunch of photochemical from a fellow photographer gone digital. Poor him. ...
So I plan to use the chemicals, and start with paper development.
Does anybody have the formula for my favourite brew ?
Many thanks in advance.
Best regards.

Argentum 21st December 2011 07:07 AM

Quote:

Originally Posted by GeorgeGiralt (Post 62181)
Hello !
I'm a big fan of this paper developer because it gives cool tones on my favourites papers.
And, I'm been given a whole bunch of photochemical from a fellow photographer gone digital. Poor him. ...
So I plan to use the chemicals, and start with paper development.
Does anybody have the formula for my favourite brew ?
Many thanks in advance.
Best regards.

I'm just guessing here but it looks like it might be similar to Ilford ID62

Ilford ID-62

STOCK SOLUTION
Warm Water (125 F or 52C) - 750.0 ml
Sodium Sulfite (anhydrous) - 50.0 grams
Hydroquinone - 12.0 grams
Sodium Carbonate (desiccated) - 60.0 grams
Phenidone - 0.5 grams
Potassium Bromide - 2.0 grams
Benzotriazole - 0.2 grams
Add cold water to make - 1.0 liter

For use with contact papers, dilute 1:1 and develop 45 to 60 seconds.
For use with enlarging papers, dilute 1:3 and develop 1-1/2 to 2 minutes.
For tray development of films and plates, dilute 1:3 and develop 2 to 4 minutes.
For tank development, dilute 1:7 and develop for 4 to 8 minutes.

I don't think its actual formula is in the public domain but others may know differently.

Also look at the ilford warmtone developer ID78.

Water, 125F/52C 750 ml
Phenidone 0.5 g
Sodium Sulfite (anhydrous) 50 g
Hydroquinone 12 g
Sodium Carbonate (anhydrous) 62 g
Potassium Bromide 4.5 g
Cold water to make 1L

Dilute 1 part of the above stock solution with one part of water and develop for 1
minute at 68 F (20 C). For longer development times, dilute 1 part of stock solution
with 3 parts of water and develop for 2 minutes at 68 F (20 C).

You will see the differences between the two developers which are the amount of bromide and benzotirazole. So by playing with those values you should be able to warm up the ID62 to taste (I think) or go the whole way and start with ID78 and cool it down by playing with Bormide values.

GeorgeGiralt 21st December 2011 07:27 AM

Hello
As far as I know, ID62 is Ilford PQ. It is suitable for film and papers, Bromophen, on the other hand is only stated suitable for papers.
I made a mistake posting this here instead of chemical formulas. If someone can move it, it would be beneficial for the forum. thanks.

Argentum 21st December 2011 09:41 AM

Quote:

Originally Posted by GeorgeGiralt (Post 62185)
Hello
As far as I know, ID62 is Ilford PQ. It is suitable for film and papers, Bromophen, on the other hand is only stated suitable for papers.
I made a mistake posting this here instead of chemical formulas. If someone can move it, it would be beneficial for the forum. thanks.

You may be correct but Ilford say that PQ print developer is a dimezone-s/hydroquinone developer whereas Bromophen is a phenidone/hydroquinone developer.

I don't see dimezone-s listed in ID62 but I'm no chemist. So you may want to research just what exactly dimezone-s actually is and whether it's in ID62 cos if it isn't then ID62 isn't PQ developer.

Stocky 21st December 2011 10:52 AM

Dimezone-S is a better version of phenidone, better because it dissolves fast and keeps better in solution.

Les McLean 21st December 2011 11:55 AM

Quote:

Originally Posted by GeorgeGiralt (Post 62181)
Hello !
I'm a big fan of this paper developer because it gives cool tones on my favourites papers.
And, I'm been given a whole bunch of photochemical from a fellow photographer gone digital. Poor him. ...
So I plan to use the chemicals, and start with paper development.
Does anybody have the formula for my favourite brew ?
Many thanks in advance.
Best regards.

I've used this formula for Bromophen for many years. It was given to me by a friend, sadly not with us now, who made all his own print and paper developers.


To make stock solution

1 Litre water
Sod Metabisulphite 1.25gr
Sod Sulphite 50gr
Hydroquinone 12gr
Sod Carbonate 60 gr
Pot Bromide 2.0gr or 5cc 10% solution
Phenidone 0.5gr

Working solution 1 part stock to 3 parts water.

I'd suggest that you also experiment with different dilutions to make both stronger and weaker working solutions to achieve different results.

Have fun

vanannan 21st December 2011 12:19 PM

I keep a stock of raw chemicals in order to make up developers etc which are unavailable in the UK or at all ie Ansco 130, in my opinion it is not worth the hassle of making up Bromophen (which I use) I prefer to purchase the prepacked stuff, it is fairly inexpensive in fact it is possibly cheaper than making up your own?

Dave miller 21st December 2011 02:56 PM

Phenidone and Dimezone-S have slightly different molecular structures, but I have no idea if it is sufficient to make a difference. Check them here.

GeorgeGiralt 21st December 2011 03:36 PM

Helo !
Thanks for the formulas. I'll try them next week and see what I get.
As I use either Bromophen or PQ, I'll think I'll be satisfied by the results. Bromophen undiluted gives so cold tones it's icy !
As per the price, I've got the chemicals for free. So it will be difficult to beat !

Argentum 22nd December 2011 11:38 AM

As you can see the formula Les gives is very similar to ID62. It is minus the benzotrizole which is anti foggant but has added sodium metabisulphite which is an anti oxidant. The differences are subtle but one may be easier to adjust than the other. I'd go with the version Les gives as you can get some knowledgeable help with it.;)


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