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#1
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Negative Cleaner ?
"?" ?@???.??? wrote in message ... Out of habit I have been using the Edwall Negative Cleaner for my 35mm negs. Is there anything "better"? -- Regards, Dewey Clark http://www.historictimekeepers.com Ebay Sales: http://cgi6.ebay.com/aw-cgi/eBayISAP...ems&userid=dsc Restorations, Parts for Hamilton M21s, Products for Craftsmen Makers of Historic Timekeepers Ultrasonic Clock Cleaning Solution Probably not. Edwal cleaner is 1,1,1 trichlorethane, once widely available as a cleaning solvent but now hard to get because its an environmental hazard. The Edwal cleaner evidently also has something else in it for anti-static purposes. Kodak now recommends very dry Isopropyl alcohol for film cleaning. It must be at least 99% pure. Not chemical purity but lack of water. Any water in it will cause streaking. Unfortunately, the best film cleaners have all turned out to be either very toxic (Carbon tetrachloride) or an environmental hazard (trichlor or the stuff used in motion picture film cleaners). The fancy film cleaner sold by Photographic Solutions is just pure alcohol. You can get 99% Isopropyl alcohol in many drugstores, its very cheap. This also works for cleaning lenses. The problem is that it begins to absorb air from the atmosphere as soon as its opened. After a time it becomes about 91%, not dry enough for use as a cleaning solvent without leaving a water residue behind. -- --- Richard Knoppow Los Angeles, CA, USA |
#2
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Negative Cleaner ?
Richard Knoppow wrote:
Edwal cleaner is 1,1,1 trichlorethane, once widely available as a cleaning solvent but now hard to get because its an environmental hazard. I think Edwal has also made the shift away from chlorinated cleaners. The bottle I have says: "Contains isopropyl alcohol". Unless the original poster has an older bottle, he probably has the same thing. Kodak now recommends very dry Isopropyl alcohol for film cleaning. Which seems to be what Edwal's current formulation contains. As a minor point, in case the poster has very old negatives, Kodak also warns against using isopropyl alcohol on old nitrate-based negatives, since it reacts with the base. 190 proof ethyl alcohol is recommended instead. You can get it in liquor stores in some states under the names Everclear or Clear Spring. |
#3
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Negative Cleaner ?
On 1/23/2004 4:35 PM James Robinson spake thus:
As a minor point, in case the poster has very old negatives, Kodak also warns against using isopropyl alcohol on old nitrate-based negatives, since it reacts with the base. 190 proof ethyl alcohol is recommended instead. You can get it in liquor stores in some states under the names Everclear or Clear Spring. Which of course has other uses as well; perhaps not a bad idea to keep a bottle around the darkroom just for those emergency mood-altering needs. -- Focus: A very overrated feature. - From Marcy Merrill's lexicon at Junk Store Cameras (http://merrillphoto.com/JunkStoreCameras.htm) |
#4
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Negative Cleaner ?
"David Nebenzahl" wrote in message ... On 1/23/2004 4:35 PM James Robinson spake thus: As a minor point, in case the poster has very old negatives, Kodak also warns against using isopropyl alcohol on old nitrate-based negatives, since it reacts with the base. 190 proof ethyl alcohol is recommended instead. You can get it in liquor stores in some states under the names Everclear or Clear Spring. Which of course has other uses as well; perhaps not a bad idea to keep a bottle around the darkroom just for those emergency mood-altering needs. -- Focus: A very overrated feature. - From Marcy Merrill's lexicon at Junk Store Cameras (http://merrillphoto.com/JunkStoreCameras.htm) I have use 3M aerosol film cleaner from Office supplies. (For handling negs on to matts for dev.) I don't know the composition or any historic degradation but works well and after 3 years has shown no adverse reaction. May not be perfect all the same but it's convenient. otzi |
#5
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Negative Cleaner ?
The bottle I got just this week from Adorama uses Trichloroethane.
-- Regards, Dewey Clark http://www.historictimekeepers.com Ebay Sales: http://cgi6.ebay.com/aw-cgi/eBayISAP...ems&userid=dsc Restorations, Parts for Hamilton M21s, Products for Craftsmen Makers of Historic Timekeepers Ultrasonic Clock Cleaning Solution "James Robinson" wrote in message ... Richard Knoppow wrote: Edwal cleaner is 1,1,1 trichlorethane, once widely available as a cleaning solvent but now hard to get because its an environmental hazard. I think Edwal has also made the shift away from chlorinated cleaners. The bottle I have says: "Contains isopropyl alcohol". Unless the original poster has an older bottle, he probably has the same thing. Kodak now recommends very dry Isopropyl alcohol for film cleaning. Which seems to be what Edwal's current formulation contains. As a minor point, in case the poster has very old negatives, Kodak also warns against using isopropyl alcohol on old nitrate-based negatives, since it reacts with the base. 190 proof ethyl alcohol is recommended instead. You can get it in liquor stores in some states under the names Everclear or Clear Spring. |
#6
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Negative Cleaner ?
? wrote:
The bottle I got just this week from Adorama uses Trichloroethane. Savor it. The chemical manufacturers stopped making trichloroethane in 1996, as a result of the Montreal Protocol. They were allowed to use up existing supplies, and it can be recycled, so you can still sometimes find it, but typically at a very high price. The only new supplies now available are for research or laboratory purposes. Adorama must have had that bottle on the shelf for a while. |
#7
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Negative Cleaner ?
On 1/24/2004 2:45 PM James Robinson spake thus:
? wrote: The bottle I got just this week from Adorama uses Trichloroethane. Savor it. The chemical manufacturers stopped making trichloroethane in 1996, as a result of the Montreal Protocol. They were allowed to use up existing supplies, and it can be recycled, so you can still sometimes find it, but typically at a very high price. The only new supplies now available are for research or laboratory purposes. As for phasing out TCE, all I can say is, denks Gott. It'll be nice when it finally goes the way of those X-ray machines you used to be able to put a nickel in to see the bones in your feet, and by that time, nobody'll mourn its passing as there will be equally good ways to clean film. -- Focus: A very overrated feature. - From Marcy Merrill's lexicon at Junk Store Cameras (http://merrillphoto.com/JunkStoreCameras.htm) |
#8
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Negative Cleaner ?
[snip] The fancy film cleaner sold by Photographic Solutions is just pure alcohol. [snip] --- Richard Knoppow Los Angeles, CA, USA Richard, Are you sure about this? Stuff smells like and reminds me of the thinner I used when I was a kid building Guillow paper over balsa framed models (my personal favorite was the P-38). Regardless, I'm not thrilled with it's use as a film cleaner, but it does wonders on Ilfochrome prints or other glossy surfaces. Kills fingerprints like right now. I still have a bottle of the old Kodak film cleaner for my negatives and I'm using it sparingly. Jim __________________________________________________ _____________________________ Posted Via Uncensored-News.Com - Accounts Starting At $6.95 - http://www.uncensored-news.com The Worlds Uncensored News Source |
#9
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Negative Cleaner ?
"Jim Phelps" wrote in message ... [snip] The fancy film cleaner sold by Photographic Solutions is just pure alcohol. [snip] --- Richard Knoppow Los Angeles, CA, USA Richard, Are you sure about this? Stuff smells like and reminds me of the thinner I used when I was a kid building Guillow paper over balsa framed models (my personal favorite was the P-38). Regardless, I'm not thrilled with it's use as a film cleaner, but it does wonders on Ilfochrome prints or other glossy surfaces. Kills fingerprints like right now. I still have a bottle of the old Kodak film cleaner for my negatives and I'm using it sparingly. Smells like toluene or xylene maybe? |
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