Kodak replacing 7278 Tri-X

[Guest]

From the Kodak 16mm website:

Eastman Kodak Company is introducing two new black-and-white reversal films this fall, as well as a new first developer and bleach for the black-and-white reversal process. Below is advance information on the changes that will occur with the launch of these products.

KODAK TRI-X Black-and-White Reversal Film 7266 - Available September 2

Replaces EASTMAN TRI-X Reversal Film 7278.
7278 and 7266 give the same results in both the new and the current processes.
KODAK PLUS-X Black-and-White reversal Film 7265 - Available October 1

Replaces EASTMAN PLUS-X Reversal Film 7276
Both 7265 and 7276 are one stop faster in the new developer.
7265 will be rated at 100 speed.
KODAK Black-and-White Reversal First Developer Replenisher - Available October 1


http://www.kodak.com/US/en/motion/16mm/ ... 2.20&lc=en

[calgodot]

C'etait moi.

[wahiba]

If big K are promoting black and white 16mm there must still be a market. They could have used the health and safety issues regarding developers as a good opportunity to dump the product. As far as I am aware Ilford no longer make 16mm b&w film stock.

[Angus]

I don't think there are any real health & safety issues with B&W stock or chemicals. Probably Kodak just want to move onto new emulsions...a shame for those of us who particularly like the old ones!

Anybody know if this will affect the super 8 plus-x and tri-x ?
Will we be getting something new too or continuing with the old...or...shudder....losing B&W?

[Herb Montes]

You can still get Ilford 16mm b&w negative here.

I'm hoping Kodak changed the bleach chemistry for reversal processing since the current sulfuric acid is very dangerous to use and difficult to acquire. If they have then I hope to see a new b&w reversal chemical kit out soon. I can't seem to find the T-Max kit anymore. :?

[Carlos 8mm]

Mmm,
If these new B&W rev. stocks have T-grain technology, (less grain, more resolving power) I just can say YEPEEEEEEEEEEEE !!!!

Carlos

[Angus]

The sulphuric acid is not dangerous in the concnetrations used in reversal bleach...but the stuff you might buy in order to make your own solutions is certainly very dangerous.

However...every recipe I know for B&W reversal bleach involves sulphuric acid.

Wahiba knows a UK source for sulphuric acid.

[nik-super8]

Angus wrote:

I don't think there are any real health & safety issues with B&W stock or chemicals.

Excuse me, but this is completely wrong.

This is what Kodak says:

Why does KODAK want to reformulate the films, the developer and the bleach?
The current B&W reversal bleach contains hexavalent chromium. We formulated a new bleach that eliminates the chromium, but it was not compatible with the current Kodak B&W reversal films.

Kodak`s current B&W reversal stocks require Bleach R-9 for processing.
This bleach bath contains potassium dichromate (chromium VI) which is very dangerous and causes cancer.
Mixed in a solution with sulfuric acid you generate chromosulfuric acid, one of the most agressive oxidants known in chemistry.
The use of chromosulfuric acid is mainly limited to cleaning expensive glas vessels in laboratories, today.

You may visit the Merck datasheet for further details: http://chemdat.merck.de/documents/sds/e ... 102499.pdf

I would never use bleach baths containing potassium or sodium dichromate at home because severe injuries to health may occur.

[mattias]

This bleach bath contains potassium dichromate (chromium VI) which is very dangerous and causes cancer.

as well as several autoimmune syndromes like crohn's, eczema and asthma. just ask erin brockovich. :-)

(the smiley means you can laugh here if you want, not that i'm not being serious) ;-)

/matt

[Freya]

You can still get Ilford 16mm b&w negative here.

Are you sure? Ilford told me they discontinued all 16mm stocks last year?
Perhaps this is only in the u.k.? Or perhaps you know a supplier/reseller who still has some?

love

Freya

[Angus]

potassium dichromate in solution is considered safe enough for school children to use.

It all depends on the concentrations of solution used. The concentrations of acid and dichromate in a reversal bleach are pretty low...you'd have to drink pints of the stuff to actually do yourself any serious damage.