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Topic: Terminologies?
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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 10-29-2000 05:38 AM
I.B. stands for "imbibition." While it is usually used to describe Technicolor's release printing process, it techinally means:"Depending on the wetting properties of the fluids there are essentially two different types of displacement in two-phase flow in porous media. ..... we are considering drainage displacements where a non-wetting invading fluid displaces a wetting fluid. The opposite case, imbibition, occurs when a wetting fluid displaces a non-wetting fluid. The mechanisms of the displacements in drainage and imbibition are quite different and the two cases should not be confused. Typically, slow drainage is characterized by piston-like motion inside the pores where the invading non-wetting fluid only enters a pore if the capillary pressure is equal to or greater than the threshold pressure of that pore. The threshold pressure corresponds to the capillary pressure in the narrowest part of the pore. However, in imbibition at low injection rate the invading fluid will enter the most narrow pores before any other is considered." See: http://www.fys.uio.no/~eaker/thesis/node10.html For a good explanation of imbibition as it applies to motion pictures, see Marty's excellent web page: http://www.widescreenmuseum.com/oldcolor/technicolor1.htm Or: http://home.att.net/~B-P.TRUSCIO/COLORDEX.htm Or, for a quick explanation: http://www.tlcdelivers.com/tlc/crs/Bib0352.htm Don't know "LPP."
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Bruce McGee
Phenomenal Film Handler
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Posts: 1776
From: Asheville, NC USA... Nowhere in Particular.
Registered: Aug 1999
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posted 10-30-2000 10:51 AM
So far so good for the LPP stocks.I have several 1982-1983 LPP prints that are holding up with regular use and the blacks are still black, and the colors are still vibrant. As for Vinegar Syndrome, I have a single 35mm feature made in 1983 on tri-acetate stock that has VS in reel one only, This print sat unused in a hot warehouse for 15 years. Then I got it. The only thing that I notice on the VS reel is that there is a slight color shift on the side of the film that was up. The print was stored flat on cores. FilmGuard took care of the smell enought so that the only time that I can smell the film is when it is being run on the mighty Holmes. R's 2-5 dont smell at all, and have no image problems. My IB prints are stunning.
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