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Topic: Magnetic Pattern Viewer
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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 10-12-2001 09:57 AM
Here is a link to Sprague "magnetic developer": http://www.sprague-magnetics.com/library/sprgmag.pdf Here are links to "magnetic viewers" http://www.sigma-hc.co.jp/english/magnet_viewer.html http://www.darylscience.com/3DMag.html http://www.magnetsales.com/Otherprod/Measure.htm#field http://www.sigma-hc.co.jp/english/ Here are some links to historical information: http://www.sssm.com/editing/museum/lobby.html http://www.sssm.com/editing/museum/smith/smith.html One brand was Ampex "Edivue Diluent (developer)" http://www.xs4all.nl/~levend/tvmuseum/tvmuseumedit/edit05.htm http://www.magneticimage.com/people/Harry/Quads/quads.html http://www.screeneditors.com/news/issue49.htm details the method: "Whatever method you used to find the cut point, you then developed an image of the recorded tracks using a suspension of iron dust in benzine. This required a fair degree of skill, even when magnetic developer pens came on the market. If you applied too little of the mixture you couldn’t see the tracks, and if you applied too much you obliterated them. Either way you had to start again, wiping down the tape and redeveloping until you could reliably read the track information." ------------------ John P. Pytlak, Senior Technical Specialist Worldwide Technical Services, Entertainment Imaging Research Labs, Building 69, Room 7525A Rochester, New York, 14650-1922 USA Tel: 716-477-5325 Cell: 716-781-4036 Fax: 716-722-7243 E-Mail: john.pytlak@kodak.com Web site: http://www.kodak.com/go/motion
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