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OGly 10 b&w film stock


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#1 Richardson Leao

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Posted 22 January 2007 - 09:45 PM

Dear all,

I decided recently that the ultimate DIY thing to do in filming would be to do my own film stock... the OGly 10 (Orthochromatic Ugly Film Emulsion iso 10) to then play with the sensitivity, grain etc. I had a few problems with the gelatin consistency but this appear to be improving by the addition of sorbitol. Thanks to the helping hand of the people at the www.apug.org forum, I got the emulsion now with more flexibility than I had before. I will now work on increasing the sensitivity (right now, iso 10) and later work on a coating machine (as coating 30m of acetate, does not sound fun). Anyway, I am showing one of the frames that survived when traveling through the spools and threads of a konvas 1m (there was a lot of emulsion shredded as I didn't use the flexible emulsion). Once I get a nice and soft emulsion with (at least) iso 30 I'll post the recipe. Anyway, here is the frame:

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#2 mattuhry

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Posted 22 January 2007 - 11:13 PM

Wait a minute, you made the film stock? coated clear leader with emulsion ? That is truly mas macho. Tell me more....

Matt Uhry
www.fuzby.com
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#3 Richardson Leao

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Posted 23 January 2007 - 12:51 AM

Wait a minute, you made the film stock? coated clear leader with emulsion ? That is truly mas macho. Tell me more....

Matt Uhry
www.fuzby.com


Exactly... It started by putting a silver ring on a beaker with nitric acid = Silver nitrate, then slowly dropping silver nitrate onto potassium bromide (on a safe light), then, soaking gelatin... Then I actually washed away the emulsion of an old film (with a hard brush) as I could not get clear leader here in Australia (at least not cheaper than the same footage of film stock). Then I used a brush to spread the gelatin on the acetate. It got very irregular as I did not use any surfactant (to spread it evenly). Once I get a good emulsion I'll build a heated compressed air system that I could just coat larger quantities of leader. Cheers.

richard
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#4 Adam Frisch FSF

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Posted 23 January 2007 - 05:17 AM

This is really exciting, please keep us informed.
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#5 Mike Williamson

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Posted 23 January 2007 - 09:13 PM

Sweet. Post more info as it becomes available, have you tried doing stills with it yet?
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#6 Richardson Leao

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Posted 23 January 2007 - 09:50 PM

Sweet. Post more info as it becomes available, have you tried doing stills with it yet?


I will try today with a new batch (that's much more flexible), however, I think I'll only try 1/30 and 1/60 as that would be 24 or 16fps. I have also ordered a tinny bit of panchromatic dye to see if I get some pan sensitivity (the PanGly)

cheers
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#7 Henri Titchen

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Posted 24 January 2007 - 03:22 PM

Congratulations on your succesful experiment! Well done!

Please keep us all informed on your progress.

Henry.
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#8 Dan Salzmann

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Posted 24 January 2007 - 04:08 PM

That is serious rock and roll! I as well am very curious to hear more about your experiments.
What is the approximate ASA of your film stock?
Again hat's off and good luck!
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#9 Richardson Leao

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Posted 24 January 2007 - 10:42 PM

That is serious rock and roll! I as well am very curious to hear more about your experiments.
What is the approximate ASA of your film stock?
Again hat's off and good luck!


I guess the first batch was about iso 10. But the second batch, that I did in a much more controlled environment... I would say 20. And now it's very flexible and I'll try in 16mm once I get my clear leader. The only thing I don't understand is why silver is becoming so expensive. As everybody says that film is dying... Where all the silver is going to? Thanks for the comments though.
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#10 Nathan Milford

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Posted 24 January 2007 - 10:45 PM

Just wondering... what chemicals are you processing in?
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#11 Richardson Leao

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Posted 25 January 2007 - 02:10 AM

Just wondering... what chemicals are you processing in?


Only normal Kodak D-19 and ilford fixer/hardner (forgot the name) but the same I use for 7222.
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#12 Bernhard Zitz

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Posted 27 January 2007 - 12:21 PM

yeah right on, that's the hell of a nice idea!!!

don't know the price but here you get clear leader http://www.filmotec....3_e/lf_3_e.html

cheers, Bernhard
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#13 Richardson Leao

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Posted 30 January 2007 - 09:47 PM

yeah right on, that's the hell of a nice idea!!!

don't know the price but here you get clear leader http://www.filmotec....3_e/lf_3_e.html

cheers, Bernhard


Thanks Bernhard,

I've got some leader from ebay to start with and I am also doing now a 'coating' machine. Keep you guys posted anyway. Cheers
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#14 Michael Collier

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Posted 30 January 2007 - 10:08 PM

Very impressive. Keep us posted, I sorta wanna try this now. Great work. What was the neg size on that picture? It has such an eerie look to it, I think graphic designers get paid thousands to photoshop a look like that.
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