Mintol developer

[Ray Rogers]

Neither metol nor ascorbic acid are considered to be staining developers. In fact ascorbic acid cannot produce any polymerized phenols because it does not contain a benzene ring.

What about Phenylalanine (2-Amino-3-phenylpropanoic acid) as the source?

 

[Gerald C Koch]

What about Phenylalanine (2-Amino-3-phenylpropanoic acid) as the source?

Hi Ray,

Sorry phenylalanine is not a developing agent either.

Thanks for the offer of Frisk but I'm not able to do any wet photograpphy at the present time.

 

[Ray Rogers]

Jerry,
OK, let me know if that changes and I will send you a box
(you can eat them if they don't develop!)

BTW
What sort of "test" would you suggest?

re phenylalanine:
I wouldn't think it has to develop on its own in order to produce an image wise stain.

If you can think of a simple rough or "field" test just to see if there is a stain produced or not I guess I could...
I just don't want to spend too much time thinking about it.

 

[Gerald C Koch]

I was thinking that a few exposures could be developed in "mintol" and after fixing remove the silver with Farmer's Reducer. If there is any stain image then it should be visible. The inclusion of ascorbic acid in the original formula would actually decrease any possible stain image.

Since the metol may also produce a weak stain image in the absence of sulfite this effect must be tested for by omitting the Frisk tablets in a similar experiment.