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Author Topic: Prints Shedding Blue/Purple Dust. Chris Hipp Phenomenal Film Handler Posts: 1462 From: Mesquite, Tx (east of Dallas) Registered: Jul 2003 posted 08-13-2003 05:58 PM                     Since we are on the topic: Why is it that when I use a dry web media, the dirt is only on the media where the soundtracks are? I rarely see any dirt where the image is.  |  IP: Logged John Pytlak Film God Posts: 9987 From: Rochester, NY 14650-1922 Registered: Jan 2000 posted 08-13-2003 10:04 PM                        quote: Why is it that when I use a dry web media, the dirt is only on the media where the soundtracks are? I rarely see any dirt where the image is. The projector components physically abrade the film along the edges and perforation area, so that is where debris is generated. Most good equipment designs hardly touch the image area, so abrasion is minimal there.  |  IP: Logged John Spooner Expert Film Handler Posts: 186 From: South Australia, Australia Registered: Jan 2003 posted 08-14-2003 12:39 PM                     Dear Frank, Micheal and John P. John, the point about the emulsion hanging over the perf and film edges was of interest. Subsequently I adjusted the inner hold back roller so it was further away from the film edge and the dust build up was much less, almost no dust at the last screening. So the roller`s inner flange must have been grazing the emulsion overhang, this would tie in with the fact that there were numerous fine blue filaments with the dust and yet no visible sign of actual grazing as I previously stated. Regards. John Spooner.  |  IP: Logged John Pytlak Film God Posts: 9987 From: Rochester, NY 14650-1922 Registered: Jan 2000 posted 08-14-2003 12:42 PM                        Glad that the roller adjustment helped so much. Yes, "pinching" the edge of the print can cause skivings, especially with freshly processed "green" prints.  |  IP: Logged Michael Brown Phenomenal Film Handler Posts: 1522 From: Bradford, England Registered: May 2001 posted 08-14-2003 12:48 PM                     a before e. Michael.  |  IP: Logged

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