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Formula for ClaytonF76+?


A lot of sales talk in that link.
Does it really yield twice the speed of DDX with very fine but sharp grain?
I would like to see a test to confirm it.
 

If you are looking for an E.C. based provider, perhaps you can have a look a Bellinifoto.it from Italy (they offer raw chemicals too)...
 

Yes I have seen that. It would not be unheard of for the Sigma website to contain errors; in the main those physical properties they quote for compounds they do not determine themselves, but rely on other sources. I cannot say for certain that it is wrong, as they are quoting it for quite a high concentration (10% vs max 2.5% in the Clayton formulation), but an upper value of 10 seems conspicuously high to me for a simple lactam. One possible reason for the high quoted range and upper value is they are accounting for all possible grades of NMP, to include those contaminated with methylamine (either from degradation of NMP, or the manufacturing process); that could perhaps explain it.
 
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Keith Tapscott. said:
A lot of sales talk in that link.
Does it really yield twice the speed of DDX with very fine but sharp grain?
I would like to see a test to confirm it.
Click to expand...

That's definitely the most ridiculous and absurd sales pitch for a developer I've read, by far. I guess it will lure some people though.
 

Yes, FA-1027 description sounds a lot like F76+. Also developing times are awful close to be a coincidence.
 
Keith Tapscott. said:
A lot of sales talk in that link.
Does it really yield twice the speed of DDX with very fine but sharp grain?
I would like to see a test to confirm it.
Click to expand...
The sales text claims lower fog levels than DDX, resulting in half the exposure time when printing, not when talking the picture itself.
Twice the speed of DDX would be awesome
 
Milpool said:
That's definitely the most ridiculous and absurd sales pitch for a developer I've read, by far. I guess it will lure some people though.
Click to expand...
Yes. Also does DDX produce higher fog levels than F76 Plus? Perhaps someone who has tried both can answer.

I'm sure the Clayton F76/ 1027 developer is a fine product, but it's unavailable in the UK.
 
Keith Tapscott. said:
Yes. Also does DDX produce higher fog levels than F76 Plus? Perhaps someone who has tried both can answer.

I'm sure the Clayton F76/ 1027 developer is a fine product, but it's unavailable in the UK.
Click to expand...

Never tried DDX but F76+ allowed me to use Aviphot 200 @200. Tried that on D-76 and some other developers I use normally use and couldn't because of the fog level (since film is expired).

Still, I agree it does sounds like publicity gimmick
 
RalphLambrecht said:
already gathered that it is identical to D76 but uses phenidone in place of metol; just need to know in what ratio. 1:10 is my first guess.
Click to expand...
Just a thought. Instead of trying to make a highly concentrated developer, try the Ilford PQ fine grain developer instead.

Sodium sulphite 100 grams
Hydroquinone 5 grams
Borax 2 grams
Boric acid 1 gram
Potassium bromide 1 gram
Phenidone 0.2 gram
Water to make 1 litre.

The developer is said to replicate standard MQ Borax developers, but with greater pH stability and consistency when stored for long periods.

Start with the times given for ID11 at the same dilutions. This formula is neither Microphen or Autophen, but simply a PQ equivalent to ID11.(D76)
 
The formulas given in posts 6 and 36 contain about 5x the amount of sulfite as F76+ 1+9 as can be deduced from the msds mentioned in post 11 so they are likely to be detectably more solvent than F76+ as it is often used. Also the pH of F76+ concentrate from the msds is 9.7, quite a bit higher than is likely for the boric acid buffered formulas in posts 6 and 36 which appear to be phenidone versions close to D-76 rather than F76+.
 
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