Borax vs 20 Mules

Patrick, with your Formula B / Phenidone from the Unblinking Eye article, do
you remember what your normal developing time was/is for TMX?
I'm at 7:30' and getting negs that look to be close to a stop over, yet if I
soup them in D76 I get get negs that are pretty much on the button...
My pattern is constant inversions for the first ten seconds, then one
inversion every ten seconds for the remainder of first minute, then 4
inversions over a ten second period, at minute intervals until done...

denny

"Patrick Gainer" wrote in message
...

Patrick Gainer wrote

You say they look overexposed compared to D-76? That is how they should
look. Sulfite-free developers often give more film speed.

He's comparing a phenidone developer with a M/Q. You don't think it
is the phenidone giving that higher density?

"Sulfite-free developers often..." That's a little tricky. Might not
that be due to being also "often" free of metol and hydroquinone? Dan

Dan Quinn wrote:

Patrick Gainer wrote

You say they look overexposed compared to D-76? That is how they should
look. Sulfite-free developers often give more film speed.

He's comparing a phenidone developer with a M/Q. You don't think it
is the phenidone giving that higher density?

"Sulfite-free developers often..." That's a little tricky. Might not
that be due to being also "often" free of metol and hydroquinone? Dan
It could be. It is possible to use 10 times more metol than pheindone in
the same formula. It has been a long time since I did so. I remember
remarking at the time that the MC developer was about as active as D-76.
Look at Unblinkingeye.com and see if I showed the H&D curves for both.

Patrick Gainer wrote:

Dan Quinn wrote:

Patrick Gainer wrote

You say they look overexposed compared to D-76? That is how they should
look. Sulfite-free developers often give more film speed.

He's comparing a phenidone developer with a M/Q. You don't think it
is the phenidone giving that higher density?

"Sulfite-free developers often..." That's a little tricky. Might not
that be due to being also "often" free of metol and hydroquinone? Dan
It could be. It is possible to use 10 times more metol than pheindone in
the same formula. It has been a long time since I did so. I remember
remarking at the time that the MC developer was about as active as D-76.
Look at Unblinkingeye.com and see if I showed the H&D curves for both.
I looked. I did not make the comparison between the metol and phenidone
versions. I guess I will have to.

Dan Quinn wrote:

Patrick Gainer wrote

You say they look overexposed compared to D-76? That is how they should
look. Sulfite-free developers often give more film speed.

He's comparing a phenidone developer with a M/Q. You don't think it
is the phenidone giving that higher density?

"Sulfite-free developers often..." That's a little tricky. Might not
that be due to being also "often" free of metol and hydroquinone? Dan
I just finished the test. I used a step density wedge. Developed two
strips of HP5+, one in metol-C-carbonate and the other in
phenidone-C-carbonate, each for 8 minutes at 70 F. When I plot the
curves, the only real difference is in base+fog which is 0.29 for metol,
0.38 for phenidone. The curves are otherwise parallel all the way up.
Surprised me too.

The formula:
1 tsp pHPlus (sodium carbonate)
1/2 teaspoon ascorbic acid
0.2 grams (3.5 grains) metol

or

2 ml of 1% phenidone in propylene glycol.

Partick

Do you think some benzotriazole would be advisable with phenidone?

Thanks,

Jorge

Patrick Gainer wrote in
:

I just finished the test. I used a step density wedge. Developed two
strips of HP5+, one in metol-C-carbonate and the other in
phenidone-C-carbonate, each for 8 minutes at 70 F. When I plot the
curves, the only real difference is in base+fog which is 0.29 for
metol, 0.38 for phenidone. The curves are otherwise parallel all the
way up. Surprised me too.

The formula:
1 tsp pHPlus (sodium carbonate)
1/2 teaspoon ascorbic acid
0.2 grams (3.5 grains) metol

or

2 ml of 1% phenidone in propylene glycol.

Jorge Omar wrote:

Partick

Do you think some benzotriazole would be advisable with phenidone?

Thanks,

Jorge

Patrick Gainer wrote in
:

I just finished the test. I used a step density wedge. Developed two
strips of HP5+, one in metol-C-carbonate and the other in
phenidone-C-carbonate, each for 8 minutes at 70 F. When I plot the
curves, the only real difference is in base+fog which is 0.29 for
metol, 0.38 for phenidone. The curves are otherwise parallel all the
way up. Surprised me too.

The formula:
1 tsp pHPlus (sodium carbonate)
1/2 teaspoon ascorbic acid
0.2 grams (3.5 grains) metol

or

2 ml of 1% phenidone in propylene glycol.

Not worth the trouble or expense. You can make this developer for leaa
than 50 cents a gallon. That much difference in density won't affect the
grain noticeably.