Designing T-Max Films: TMX speed; In response to David William's request

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One trade off was the speed of TMX. The first specification was for a family of speeds 200, 400, and 1000 speed films. These speed points corresponded to the consumer color negative films of the 1980's. We made a series of coatings that varied the grain size and consequently the speed of the 200 speed film. I liked the fine grain of the slower films in the series. 100 was much faster than Panatomic-X EI 32. With 100 speed t-grains the grain was finer than Panatomic X and the MTF was better. So we changed the goal and worked on making the film 100 speed. It took some additional work but it proved to be worthwhile. Many give-and-take decisions are made in film design.


I occasionally see comments that Panatomic-X is missed but in a side by side comparison I still feel that TMX is a better film. I still have the prints from a Pan-X and TMX experimental film comparison set that I made in the early 1980s. In an ideal world film manufacturers would still make the old films from days gone-by. But the manufacturers have to minimize the number of films in the product line. In nearly all product lines there is a conflict between marketing and manufacturing. Marketing would like a customized product for each class of user. Manufacturing would like one product for all customers. This conflict is no unique to photography. Food products have the same dilemma.

www.makingKODAKfilm.com

Bob Shanebrook
 
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Andrew O'Neill

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I did a video a couple years ago, comparing TMX and Panatomic-X. They were almost identical in their renderings, but TMX's resolution and grain were superior.
 

MattKing

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Thread title tweaked - for those viewing on tiny screens.
 

Craig

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Can you comment on T Max developer? What are it's advantages or disadvantages compared to Xtol or D76?

With the passage of time, T Max developer seems to have passed from consciousness in the general photocommunity, perhaps it has been overshadowed by Xtol? I'd be curious where you see it fitting in the marketplace.
 

mshchem

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Can you comment on T Max developer? What are it's advantages or disadvantages compared to Xtol or D76?

With the passage of time, T Max developer seems to have passed from consciousness in the general photocommunity, perhaps it has been overshadowed by Xtol? I'd be curious where you see it fitting in the marketplace.

You don't need a 5L bucket and a paddle with T-Max developer 😁. So much easier for people who don't have dedicated space. (Wait you didn't ask for my opinion) 🙃
 

Craig

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You don't need a 5L bucket and a paddle with T-Max developer 😁. So much easier for people who don't have dedicated space. (Wait you didn't ask for my opinion) 🙃

I do have a 5L beaker though! My magnetic stirrer works with it.
 

mshchem

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TMX in TMax developer was my first try back then, but I like D76 (talking about 120 film in small Jobo tanks) better as the highlights don't build up that fast/dense.
Pyrocat is great, too...

Do you make up your D-76 from the formula or buy it in a pouch? D-76 works for everything. I use Jobo 1500 series tanks and stock XTOL. Have to say I'm hooked on the Jobo systems.
 

JensH

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Do you make up your D-76 from the formula or buy it in a pouch? D-76 works for everything. I use Jobo 1500 series tanks and stock XTOL. Have to say I'm hooked on the Jobo systems.

Hi,

I just use the original Kodak pouch for a gallon.
Yes, I have 1500 series tanks, too - ass well as Kaiser ones.
Indeed Jobo is a great company with very good customer service and really nice stuff (like their 30xx lf tanks)...

@ Bob: Btw, that makes me wonder if it is true, that the TMax "prototypes" were first tested/optimised for D76???
 
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