P-80(П-80) PQ Developer

Nikola Dulgiarov · Jan 26, 2010

Nikola Dulgiarov submitted a new resource:

(there was a url link here which no longer exists) - P-80(П-80) PQ Developer

Hi,
this is my favorite paper developer, and I find it amazing for its longevity and capacity.I've decided to share the recipe, hope this is the right place.

The developer is well buffered and develops with a neutral tone:
П-80
water - 750ml
sodium sulfite, anh 20gr
Hydroquinone 3,5gr
Sodium Carbonate, anh 20gr
Phenidone 0,15gr
Sodium Bicarbonate 2,6gr
Potassium Bromide 1,6gr
Add water to 1 liter
I use a 1% solution of phenidone in methyl alcohol, and add 15ml of that, instead....

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

Ian Grant · Jan 26, 2010

This is extremely close to Ilford ID-78 and Agfa WA and is a warm-tone developer, and yes it will have a good dish life and capacity.

Ian

CBG · Jan 27, 2010

Perhaps you could tell us what dilution, time, temperature you would recommend for using this developer? And maybe you could say what source this formula comes from? I like too have all that information listed together with each formula whenever I can. Thanks!

Nikola Dulgiarov · Jan 27, 2010

Ok, well this formula is for the dilute developer, as in it is ready to use. Moreover, at about 20C, a normal print comes out in 1-2min. It comes from a photography formula book in Bulgarian. According to it, the developer has been(dare I say) developed by a Bulgarian photographer, but as Ian has mentioned above, it's probably a variation of a common formula.However, this one uses sod. bicarbonate, which act as a very good buffer, but one must be careful, as if a too acidic stop may cause bubbles that separate the emulsion from the paper(so I have noticed with old paper).If there's anything else, ask ahead.
Nikola

CBG · Jan 28, 2010

Dear Nikoka, Thanks so much for the information on the source and usage of the developer! Could you add what the name of the photographer and the title of the book are?

Nikola Dulgiarov · Jan 29, 2010

The book is a Bulgarian one, called " Фотограгски рецептурен справочик" (Photographic Formulae Reference book) written by Vladislav Kiperov. The developer is acclaimed to have been created by G. Zahariev. One can,apparently, replace the bromide with BZTZ , in order to yield a more neutral, cooler tone.
Nikola

CBG · Jan 29, 2010

Thank you so much Nikola!

Alienguru · Jan 29, 2010

yeah, there are many interesting recipes in the Kiperov's book

CBG · Jan 31, 2010

Alienguru said:
yeah, there are many interesting recipes in the Kiperov's book

Care to post some of the most interesting? Thanks!

gainer · Feb 18, 2010

The usual abbreviation for "gram", which I am sure you meant, is "g", while "gr" is short for grains. Those of us with experience know what you meant, while some without mighr be confused.

MFstooges · Apr 24, 2010

gainer said:
The usual abbreviation for "gram", which I am sure you meant, is "g", while "gr" is short for grains. Those of us with experience know what you meant, while some without mighr be confused.

In where I live we use metric and never heard of grain hence gr --> gram

PhotoJim · Apr 24, 2010

MFstooges said:
In where I live we use metric and never heard of grain hence gr --> gram

Understandable!

Metric standard is g (hence mg, kg) so we tend to use g in this part of the world.

P-80(П-80) PQ Developer

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