|
|
This topic comprises 4 pages: 1 2 3 4
|
|
Author
|
Topic: Archival Prints
|
|
|
|
|
|
|
|
|
John Pytlak
Film God

Posts: 9987
From: Rochester, NY 14650-1922
Registered: Jan 2000
|
posted 02-12-2004 12:24 PM
Wet-gate printing is normally done using the solvent tetrachloroethylene (perchloroethylene or "perc"), which has a refractive index of 1.504, which is a very close match to that of triacetate film base (1.478) and gelatin emulsion (1.52). Polyester (ESTAR) base is bi-refringent, and has a much higher refractive index of about 1.66, so "perc" does not optically "hide" polyester base scratches as well as triacetate base scratches. Unfortunately, no suitable solvents have been found that better match the 1.66 refractive index of polyester base.
Kodak developed much of the technology of wet printing, and published many technical papers on the subject. Henry Imus and Joe Schmit of Technicolor were also key contributors to the technology. A key paper is "Printing Motion-Picture Films Immersed in a Liquid Part III: Evaluation of Liquids" by Delwiche, Clifford, and Weller, Journal of the SMPTE, October 1958, Volume 67, pages 678-686.
"Perc" is also widely used for dry cleaning clothing, and is efficiently recycled by motion picture labs:
http://www.kodak.com/US/en/motion/hse/perc_wetGate.jhtml?id=0.1.4.5.6.4&lc=en
quote: This publication addresses the most commonly asked environmental, health, and safety questions about the use of perchloroethylene in Motion Picture wet-gate printing applications.
http://www.kodak.com/US/en/motion/support/h1/printingP.shtml#wetgate
Scratch reduction can also be accomplished by use of diffuse illumination (as used in the Kodak-developed scanners for the Thomson Spirit datacines), or by "dirt busting" techniques for digital intermediate or telecine transfer:
http://www.cinesite.com/?124
Here is a recent restoration project Mr. Harris worked on with Kodak Cinesite:
http://www.kodak.com/US/en/motion/newsletters/inCamera/oct2003/patriot.shtml
http://www.cinesite.com/?1243&0&1380
quote: The following article was written by Bob Fisher and David Huering for In Camera (September/October 2003)
Robert A. Harris of The Film Preserve has played vital roles in restoring and preserving many of the crown jewels of Hollywood's history, including My Fair Lady, Lawrence of Arabia and Spartacus. Harris is currently focusing his attention on a unique restoration project. The Story of A Patriot has been playing at a theatre in the Williamsburg colonial village in Virginia, since April 1957. Estimates are that more than 30 million visitors to have seen the film depiction of life in America during the revolutionary war. Harris says that when he first saw the film during the late 1950s, it touched him deeply. He describes the film restoration project as a labor of love.
The film was originally produced and shown in VistaVision format, which is designed to put a huge, widescreen image horizontally on the screen. It features six-track magnetic sound running at twice the normal speed, which was revolutionary for its time and delivered on its promise of "motion picture high fidelity." "It is like looking through a window to the past," says Harris.
Since the early 1980s, the film has been shown to audiences on 70mm film format. When Harris saw the film again in 1994, he knew a rescue effort was in order. "The picture was contrasty, grainy, out of focus and out of registration," he says. "I met with Richard McCluney of Colonial Williamsburg Productions and with his approval, the restoration project began. I've worked with Cinesite, in Los Angeles, on other restoration projects before. I knew how dedicated the people there are, and they have been extremely helpful throughout the process."
Harris' eyes and memory are helping Cinesite restoration specialists Brad Reinke and Jerry Pooler restore the film to its original grandeur. A hodgepodge of older elements, most importantly a 35mm dye transfer copy of reel 2AB provided by a collector, are also used as a reference for color. Harris and the team are also consulting with 94-year-old Haskell Boggs, ASC, the original cinematographer on the project.
"We've looked at costumes and props that still exist, as well as the brick on the buildings as they stand now," says Harris. "It's a major puzzle, but we're solving it piece by piece."
The original VistaVision images have been scanned into the digital realm at 6K resolution. Each frame is represented by 150-200 megabytes. The film consists of about 54,000 frames. The result is a gargantuan data management challenge. Once perfected, the frames will be output to VistaVision interpositive and optically converted to 65 mm, from which 70 mm prints will be struck. The work will be done at Pacific Title and CFI in Los Angeles. Cinesite will also provide black and white separation masters for archival purposes. Cinesite Manager of Restoration Services, Brad Reinke, says that the negative had a significant amount of differential dye fade as well as overall color saturation dye fade.
"Other than the dye fade, the negative was actually is very good condition," he says. "There are some dirt problems, scratches, and lens falloff in some cases. We are also recombining some separation masters when necessary. One crucial aspect of this project is to preserve the original grain structure. The film was originally shot on Kodak stocks, and we have the advantage of bring a sister company to Kodak. We're going back and researching the technical specifications on these older stocks and applying that knowledge to here.
"The characters, costumes and environments in this film are very period," says Reinke, "but the look of the film is not. It's incredibly rich and vibrant and colorful. Bob Harris and the Williamsburg people want the images to pop off the screen. They want those colors sharp and vibrant. "The Patriot is a big project for us because of the size of the files and the extent of the restoration necessary," says Reinke. "But it's also very important to us because of the historical significance. It's very exciting to work on a project that is the oldest running American film."
| IP: Logged
|
|
Leo Enticknap
Film God

Posts: 7474
From: Loma Linda, CA
Registered: Jul 2000
|
posted 02-12-2004 01:42 PM
quote: would you use Film Guard on an archival print?
In a word, yes - if it's genuinely a print, i.e. a viewing copy, not a preservation element. For older and more fragile viewing copies I do strongly believe that FG has a lot to offer. Firstly it has a lubricating function, meaning that the film will travel more smoothly across the surfaces it comes into contact with. If there is slight shrinkage, that will ease the passage of the sprocket teeth in and out of the perforations, for one thing. Secondly, it will remove surface dirt. And finally it will 'fill in' lighter scratches, again helping to clean up the on-screen image.
The way I apply FG is with a Selvyt (i.e. lint-free) cloth (I believe that 'Webril Wipes', available in the US, are pretty similar) while manually winding. I wind one pass through an FG-impregnated cloth and the second through a dry one to take off the residue. The second pass is important, since a heavy application of FG can dissolve the adhesive in tape splices, causing them to come apart in projection.
That having been said, I've only ever applied FG to viewing copies from my own archive. If you are borrowing prints from another institution, be sure to get their permission first.
quote: I've booked in 4 "archival prints",one for each week in March and I'm feeling a bit uneasy now!The application form did state it's dislike for platters but my film booker assured me that the hirers said it would be ok to run them off a platter.
Are you sure it's genuinely from an archive as distinct from a specialist arthouse/rep distributor? If so I'd be inclined to bypass your booker and get permission straight from the archive before you cut any heads and tails off. Most of them absolutely forbid it.
quote: Apart from making sure it is thread up right what other precautions should you take when handling Acetate prints?
In terms of film handling, just the usual ones. If you have a high standard of film handling at your cinema and do it carefully, there's nothing to worry about. Just check and double-check everything. Ideally, get someone else to double-check for you (human beings, however skilled and experienced, make mistakes) to minimise the risk of error.
Tbe issue you might need to look at is whether you have the correct lens and plate for the ratio these films are in. If you don't normally screen arthouse or rep titles you may be getting films in a ratio you don't normally see (i.e. full-gate silent, Academy or 1:1.66). Ditto the sound format - it could be Academy mono or Dolby 'A' type, for example. If the can and/or leader doesn't tell you, I'd suggest checking with the archive.
| IP: Logged
|
|
Tao Yue
Expert Film Handler

Posts: 209
From: Princeton, NJ
Registered: Apr 2001
|
posted 02-12-2004 08:34 PM
One important thing with acetate is to stop and think if you're not sure, don't take anything for granted. There may be something you're not familiar with.
This may be more suited to the "You suck" thread, and hopefully an "archival" print won't come this way (unless it's truly the last projection print in existence). But since the issue of acetate handling was brought up in general, and since it has some peripheral relevance to Robert A Harris who's posting on this thread ...
Here's an example: acetate prints often come on light metal reels that were used before plastic reels were common. We once got a print of Lawrence of Arabia where every single perf on one side of the film was broken.
The flanges on those metal reels tend to pop in-and-out (I'm not sure if this was how they were designed, but I've had numerous acetate prints come this way). When shipping, they are popped-in and keep the film secure. When used as the supply side, the film starts out curled a bit, so the film leaves the reel easily and you get no warning of this problem when you first handcheck the film.
When used as the takeup reel in the popped-in position, the film just does not want to go in. You have to either:
- Rotate your hand a bit and guide it in so that the film is not perpendicular to the flanges.
- Pop the flanges out, keep the film winding evenly (i.e. no telescoping), then pop it back in.
Evidently whoever had the print before us found it hard to force the film into the takeup. Instead of taking three seconds to think, he just applied more pressure on the rewinder controls, thereby breaking all the perfs. That person didn't need to be forewarned of these metal reels, he just needed to stop and think, and find a better way. Another feature of acetate is cement splices. These often become brittle with age and will fail when stressed. It may be worth it to reinforce with at least a one-sided tape splice even if the splice still seems good, because often you are gentler on the film in handchecking than the projector is. Acetate is thicker than polyester, make sure the gate isn't overtensioned.
Again, an archive print usually won't come this way. This is more related to the problems that repertory houses face day-to-day. Just make sure the print doesn't leave this way.
I wonder how frequently multiplexes with midnight movies destroy acetate prints ...
| IP: Logged
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
All times are Central (GMT -6:00)
|
This topic comprises 4 pages: 1 2 3 4
|
Powered by Infopop Corporation
UBB.classicTM
6.3.1.2
The Film-Tech Forums are designed for various members related to the cinema industry to express their opinions, viewpoints and testimonials on various products, services and events based upon speculation, personal knowledge and factual information through use, therefore all views represented here allow no liability upon the publishers of this web site and the owners of said views assume no liability for any ill will resulting from these postings. The posts made here are for educational as well as entertainment purposes and as such anyone viewing this portion of the website must accept these views as statements of the author of that opinion
and agrees to release the authors from any and all liability.
|