Film-Tech Forum ARCHIVE: VS on dice?

This is topic VS on dice? in forum Film-Yak at Film-Tech Forum ARCHIVE.

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Posted by Brad Miller (Member # 2) on 09-24-2002, 05:05 AM:

Apparently it doesn't affect just film...
click here

Posted by John Pytlak (Member # 331) on 09-24-2002, 05:52 AM:

Yep --- it's likely the same hydrolysis reaction.
http://www.kodak.com/US/en/motion/support/technical/vinegar.shtml
http://www.kodak.com/US/en/motion/support/technical/molecular.shtml
http://www.stildesign.com/english_site/pages_eg/art_eg_032002.htm
http://www.screensound.gov.au/glossary.nsf/Pages/Decomposition?OpenDocument

Again, cool, dry and vented storage will slow the onset of these degradation reactions. If sealed containers are used, Molecular Sieves will adsorb excess moisture and acid vapors, greatly slowing the degradation.

Moral of the story, don't store film or dice in a humid tropical environment, or in your damp basement or hot attic. For home "archives", a nice cool, dry, air-conditioned room would be good.

------------------
John P. Pytlak, Senior Technical Specialist
Worldwide Technical Services, Entertainment Imaging
Research Labs, Building 69, Room 7525A
Rochester, New York, 14650-1922 USA
Tel: +1 585 477 5325 Cell: +1 585 781 4036 Fax: +1 585 722 7243
e-mail: john.pytlak@kodak.com
Web site: http://www.kodak.com/go/motion

Posted by Leo Enticknap (Member # 534) on 09-24-2002, 07:09 AM:

For a reaction of a slightly more spectacular sort, someone told me once that billiard and snooker balls would occasionally ignite during a game in the early part of the century, when cellulose nitrate was used in their manufacture.

Posted by Scott Norwood (Member # 30) on 09-24-2002, 09:44 AM:

I believe that dice were once made of cellulose nitrate as well.

Posted by Jeff Taylor (Member # 443) on 09-24-2002, 10:11 AM:

Yea, but I'd still rather lose some dice or billiard balls to VS than a valuable print!

Posted by John Pytlak (Member # 331) on 09-24-2002, 10:15 AM:

I wonder if any small volume manufacturers of small plastic items like dice just recycled old nitrate or acetate film stock by dissolving film in solvent to make "dope" and cast it into the new items?
http://www.plastiquarian.com/
http://www.nswpmitb.com.au/HistoryOfPlastics.html
http://www.terrificscience.org/lessonexchange/PACTPDF/PolymerLab21.pdf
___________________________________________________________________

From "The Graduate":

Mr. McGuire: I just want to say one word to you... just one word.
Benjamin Braddock: Yes, sir.
Mr. McGuire: Are you listening?
Benjamin Braddock: Yes, sir I am.
Mr. McGuire: "Plastics."

Posted by John Schulien (Member # 215) on 09-24-2002, 11:29 AM:

They'd have a significant waste stream of solvent-soaked emulsion if they did.

Posted by John Pytlak (Member # 331) on 09-24-2002, 12:01 PM:

When film base is recycled, the gelatin emulsion is usually stripped off with bleach or enzymes.