May God have mercy on you (Patrick Gainer).Mohmad, I think that the formula Raghu supplied from Patrick Gainer will be quite easy to use. If you have propylene glycol, you can mix up the concentrate A. Separately you could supply small bags of B with the carbonate/bicarbonate.
Yes esteemed teacher (Raghu)Karl, if I understood correctly, his concern is that Gainer's amidol-ascorbic developer is largely untested and development time data is not available. Unfortunately, he doesn't have b&w film with him for doing his own tests. And it's quite expensive too. His goal is to prepare concentrated developers and supply them to hobbyists in his country. So he wants some formula that is either well-tested or someone in this forum is willing to test on a few films and give accurate data to him. Unfortunately, his customers are not ready to do the tests themselves - they want something that works painlessly the very first time they use it. If I had Amidol at my disposal, I would have tested Gainer's recipe and given approximate development time for a couple of films.
I'm not sure whether you are aware of this, but Patrick Gainer passed away in November 2015. He left an amazing legacy.May God have mercy on you (Patrick Gainer).
Karl, if I understood correctly, his concern is that Gainer's amidol-ascorbic developer is largely untested and development time data is not available. Unfortunately, he doesn't have b&w film with him for doing his own tests. And it's quite expensive too. His goal is to prepare concentrated developers and supply them to hobbyists in his country. So he wants some formula that is either well-tested or someone in this forum is willing to test on a few films and give accurate data to him. Unfortunately, his customers are not ready to do the tests themselves - they want something that works painlessly the very first time they use it. If I had Amidol at my disposal, I would have tested Gainer's recipe and given approximate development time for a couple of films.
Hello my dear brotherIn my opinion, Amidol is not suitable for distribution to amateurs who have little or no experience with photographic chemistry and are likely to be mixing developer in their kitchens or bathrooms. I know Mohmad reacted strongly to this as a supposed "environmentalist" concern. Even if you want to pave every tree in the planet, the problem is that Amidol is poisonous to people and should not be left lying around in inexperienced people's houses.
You have Metol. Metol with sodium sulfite, or Metol plus ascorbic acid and other ingredients, will make a good developer.
Yes, I learned this sad news, I used to say (may God have mercy on the man) and it is a prayer in the language of Muslims similar to (Rest in peace)I'm not sure whether you are aware of this, but Patrick Gainer passed away in November 2015. He left an amazing legacy.
You have Metol. Metol with sodium sulfite, or Metol plus ascorbic acid and other ingredients, will make a good developer.
There are many Metol/HQ/Ascorbic based developers but a long lasting concentrated developer is what he is interested in. Kalogen is one Metol-HQ developer that meets his requirements and he has already brewed it. As para-aminophenol was available to him, he has prepared a Rodinal substitute. Similarly, with ascorbic acid, he has prepared Gainer's Ascorbic-Aminophenol based concentrated two part developer. The interest in Amidol comes from the fact that it is available to him at a bargain price. Unfortunately, there's not much publicly available information on Amidol based film developers. Interestingly, Formulary offers an Amidol film developer though it might not be best suited for roll films.
Metol | 5 g | 25 g |
Sodium Sulphite (anh) | 187.5 g | 625 g |
Hydroquinone | 20 g | 100 g |
Sodium Carbonate (anh) | 93.8 g | 468.75 g |
Potassium Bromide | 5 g | 25 g |
Benzotriazole 1% soln | 37.5 ml | 187.5 ml (or 1.88g) |
Water to | 1 litre | 5 litres |
Hello dear Irish brother.Since you are looking for concentrated developers, @mohmad khatab do you have phenidone? ID-67 was available in a concentrated stock that @Ian Grant has on his site: http://www.lostlabours.co.uk/photography/formulae/developers/devID67.htm
If you do not have phenidone, you can probably make a stock with metol. ID-67 is the phenidone version of ID-2 so you should be able to make the 1L stock with 5g of metol in place of the 0.625g of phenidone (calculating back from ID-2).
I don't have dev times to offer you, but I would expect (If I have done the math properly) that if diluted 1+9 times near to ID-11/D-76 would work, with a higher contrast result. Maybe cut 10-15% off ID-11/D-76 times.
Someone correct me if that much metol won't dissolve!
Metol 5 g 25 g Sodium Sulphite (anh) 187.5 g 625 g Hydroquinone 20 g 100 g Sodium Carbonate (anh) 93.8 g 468.75 g Potassium Bromide 5 g 25 g Benzotriazole 1% soln 37.5 ml 187.5 ml (or 1.88g) Water to 1 litre 5 litres
- But we were going to think about preparing concentrates that contain a flavor of ascorbic acid, so that we would have many different flavors in the concentrates that we prepare.
I read many times in the large format forum that the ratio is 1 X 10 ,, and this means that the amount of metol should be 6.25 grams and not 5 ,, and it has been said
Done successfullyIf you have a bit of phenidone with you, PG110B could be something worth checking out. It meets all your requirements - it's a concentrated ascorbic acid based developer that can be prepared with chemicals available to you; has a long shelf-life; is economical; has been tested; development time is available; many examples available on Flickr.
This formula is still very cool.That's right in general, but that is not what Ilford used here. I used the amount they used for ID-2, which is the Metol version of ID-67.
- Phenidion replaced with Metol (10x1)
You're absolutely right ,,Mohmad: I'm not sure the substitution of phenidone by Metol will work as you intended for PG110B. It might work but you're charting your own course with this substitution. Patrick Gainer did a lot of experiments on Metol-Ascorbic developers and you should definitely read up his posts on the same to get more insights.
It's interesting that you were able to dissolve Metol in propylene glycol which I thought was impossible to do. But I've never tried it myself. What temperature did you heat the glycol to?
D-23 is a possibility. It uses only Metol and sodium sulfite. Grant Haist's D-76H uses just Metol, sodium sulfite, and borax (borax is usually easy to find). D-76H was designed to be similar to D-76 but eliminate the hydroquinone, see Tim Layton's description at https://www.timlaytonfineart.com/bl...ow-to-make-an-eco-friendly-b-w-film-developer
Hi Mister Parker ..If I was distributing film developer to young photographers, one of the D-23 variants would be my first choice. I sort of stumbled in to mixing my own D76-H type formula by using the Beutler's formula with metaborate instead of carbonate. It's not quite as sharp as Beutler's but better on grain, and much sharper than standard D-23. Frankly, I think these formulas are as good or better than many of the more complicated formulas which require more expensive, toxic, or hard to find ingredients.
- I will give the bottle to the father of the young man and not to the young man, because there was already a young man who wanted to commit suicide and drank a defloper 14, he did not die, but the police called me and blamed me for giving a young man under the age of 18 years these chemicals.
Yes ,, mostly I already do it.Wouldn't it be better if you develop the film for such young hobbyists than giving them the developer?
Yes ,, mostly I already do it.
But there are guys who are very passionate about buying a tank from amazon and gadgets and asking me for chemistry. What should i say to them . ?
The pyro component is not available in Egypt - nor is the glycine component available?I hope and pray that you don't get into legal trouble because of the services you render to film hobbyists in your country. It's one thing if somebody attempts to harm himself by drinking your developer, but it's a bigger disaster if a criminal gets hold of concentrated poisonous developer for the purpose of harming others. Thank god you're not making concentrated pyro developers.
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