tmax 100 and tmax rs devl?

[darrin]

I have not done film processing in years and i have a question...

Calumet suggested tmax rs developer for tmax 100 8x10 and I called kodak tech help for mixing questions and they said to use it right out of the mixing jug straight 100% no dilution.

However, while looking up development times on kodak's website their pdf file said to use it 1:4.

So what do i do?

darrin

[D. Bryant]

I have not done film processing in years and i have a question...

Calumet suggested tmax rs developer for tmax 100 8x10 and I called kodak tech help for mixing questions and they said to use it right out of the mixing jug straight 100% no dilution.

However, while looking up development times on kodak's website their pdf file said to use it 1:4.

So what do i do?

darrin
Darin,

The PDF for TMAX RS can be a bit confusing. The stock mix is 1:4, you can also dilute the developer 1:1 with water for a 1:8 dilution which will give you longer a development time which may provide you with better consistency depending on how you develop your film.

If you are rotary developing with a JOBO or BTZS tubes the 1:4 dilution will work fine at shorter development times. If you are tray developing you may wish to use a more dilute working solution with extended development times.

Hope this helps,

Don BRyant

[Pat Kearns]

On the LF homepage there is an article about John Sexton's Tmax RS development methods. It gave a starting point for me. I now mix Part A & B together and use a 1:9 dilution from the straight syrup and developing at 75 degree for 9 minutes. I use a beseler 8x10 color drum and motor base. I'm satisfied with the results. Read the article and do some testing to determine what will work for you.

[Richard M. Coda]

Do not make stock mix.

Mix the Part B into the Part A.

Then use it 1:9 straight from the bottle ONE SHOT. You can also use 1:15 to extend development of N- situations. But, as always, test first.

My normal time is 7 minutes in a Jobo for N.

[D. Bryant]

Do not make stock mix.

Mix the Part B into the Part A.

Then use it 1:9 straight from the bottle ONE SHOT. You can also use 1:15 to extend development of N- situations. But, as always, test first.

My normal time is 7 minutes in a Jobo for N.

Richard,

I used to use the method described and it works fine. But I do have a question about the life of the "syrup" once A&B are mixed together. Any idea how long this mix is good for? Something comparable to HC110 perhaps?

Thanks,

Don Bryant

[keith english]

Kodaks directions for Tmas RS are confusing to say the least. Calling it developer and replinisher when it is the same thing doesn't help. Somewhere I saw a John Sexton forrmulae where you mix part A and part B as seperate quarts then mix them together just before use (one-shot). That is what I have doing 1.5 oz of each and water to make 12 ounces for use in six BTZS tubes. Seems weird but works for me and is easy to remember.

[Arne Croell]

Richard,

I used to use the method described and it works fine. But I do have a question about the life of the "syrup" once A&B are mixed together. Any idea how long this mix is good for? Something comparable to HC110 perhaps?

Thanks,

Don Bryant

I use John Sexton's method (mix A+B, then dilute 1+9 from that mixture one shot) too, since 15 years. When I know that I won't use up the A+B mix for a while, I put it in a glass bottle, and put a neutral heavy gas over it to remove the air (Tetenal Protectan). That way I have used developer that was 1.5 years old after mixing A+B without problems.

[Richard M. Coda]

Richard,

I used to use the method described and it works fine. But I do have a question about the life of the "syrup" once A&B are mixed together. Any idea how long this mix is good for? Something comparable to HC110 perhaps?

Thanks,

Don Bryant

Hi Don:

I have had no problems with it for up to a year. Breaking it down to smaller bottles does help.

Rich

[D. Bryant]

Hi Don:

I have had no problems with it for up to a year. Breaking it down to smaller bottles does help.

Rich
Thanks Rich!

[Richard M. Coda]

Thanks Rich!

You're welcome. Oops, forgot to mention... 75 degrees.

[darrin]

ok.. just to clarify (i'm an aggie from texas.., i'm slow...)

i have one gallon of mixed tmax rs... I can mix one part of that with 9 parts water.. I'm tube processing. I have a tube of pvc pipe i'm trying with plugs on the end.. I never liked tray processing and I dont have dip dunk tubs...

sorry... 'm horrible at ratios... failed math horribly... became a photographer...

d

[darrin]

sorry.. My wife is the math person... she has set me straight...

yes.. I went to college... :) I'ts just been 20 years since I had to mix my own..

d

[Richard M. Coda]

ok.. just to clarify (i'm an aggie from texas.., i'm slow...)

i have one gallon of mixed tmax rs... I can mix one part of that with 9 parts water.. I'm tube processing. I have a tube of pvc pipe i'm trying with plugs on the end.. I never liked tray processing and I dont have dip dunk tubs...

sorry... 'm horrible at ratios... failed math horribly... became a photographer...

d

Yessir.