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This topic comprises 3 pages: 1 2 3
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Author
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Topic: C02 to clean projectors...Pro or Con?
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John Pytlak
Film God
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Posts: 9987
From: Rochester, NY 14650-1922
Registered: Jan 2000
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posted 03-27-2002 04:06 PM
I strongly DISCOURAGE the use of compressed air or other gas to "clean" projectors or lenses. At best, you're just moving the dirt around. At worst, you will damage something, or hurt yourself. ![](http://www.film-tech.com/ubb/frown.gif) ------------------ 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
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Manny Knowles
"What are these things and WHY are they BLUE???"
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Posts: 4247
From: Bloomington, IN, USA
Registered: Feb 2002
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posted 03-27-2002 04:51 PM
You mean to tell me I have to toss my compressor? Or are you referring to the stuff that goes into soft drinks to make em fizzy?I have occasionally used a small 20gal horiz. compressor on wheels to help with heavy-duty cleaning of projectors. I have found it especially useful for getting dirty grease/oil out of corners & crevices and out into the open where I can wipe them up easily. But this is when I encounter a machine that is FILTHY...and by the time the compressor joins the party all of the gears and bearings are laid out on a table away from the casting. Wow - I never knew about the death threat from air bubbles in the blood! I was already intimidated by how loud this thing is, now I have a reason to be afraid...very afraid. So, how the heck do those bubbles get into the blood? ------------------ And, hey! Let's be careful out there. ~Manny.
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Manny Knowles
"What are these things and WHY are they BLUE???"
![](http://www.film-tech.com/ubbmembers/1171i.jpg)
Posts: 4247
From: Bloomington, IN, USA
Registered: Feb 2002
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posted 03-27-2002 05:39 PM
Yes there is a regulator and I keep it at 85psi...the blow gun directed using pressure below 90psi.I also use safety glasses that protect from the sides as well. ------------------ And, hey! Let's be careful out there. ~Manny.
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Paul G. Thompson
The Weenie Man
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Posts: 4718
From: Mount Vernon WA USA
Registered: Nov 2000
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posted 03-27-2002 06:08 PM
I use a CO2 bottle to blow dust out of blowers, and clear the snot out of soft drink dispenser drains. That's about it. As far as projectors are concerned, it is a definate overkill, and can be very dangerous. Some people don't have the slightest idea how much pressure is in those bottles, and how easy it is to get a gas embolism which can kill. Not to mention how dangerous the bottles are if they are dropped and the valve snaps off. The bottles will propel themselves through concrete walls and level everything in its path. As far as cleaning other electrical/electronic devices, I actually observed one individual who was the head of a certain theater chain (since went bankrupt) who used a full pressure CO2 bottle with the valve almost wide open (to the point where he had to hold the bottle upright to keep it from blowing itself over) to blow out his copier that was in the office. Hunks of drum wiper blades, and other parts (including toner) went flying all over the room. When he was done, he was pissed at the machine because it no longer worked. He was not the smartest person in the graduating class.
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John Walsh
Film God
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Posts: 2490
From: Connecticut, USA, Earth, Milky Way
Registered: Oct 1999
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posted 03-27-2002 07:31 PM
I tried using compressed air for cleaning, and Gordon is right: it can be good and bad...People who use compressed air are usually in a hurry. Now, I'm not knocking them, since they just want a clean projector and don't have much time. But, problems happen when someone takes shortcuts. I can only say I didn't use compressed air at most of the places I worked at, and I thought my projectors were pretty clean. And I didn't spend too much time cleaning them. Like anything else, common sense has to prevail. Don't crank up the pressure, keep the tank secure, watch what you point it at. I found oil and dirt getting blown onto the lenses, so I made it a habit to cap them. I eventually found that (for me, anyway) it was better to give the projectors a quick wipe out between shows with a paint brush. Then, once every 3-4 weeks, do a good cleaning (vacumn out with covers removed, wipe oil, etc.) I also check for loose screws, worn parts, blah-blah.
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