It's a good (and lengthy) read, and I will now humbly eat crow for all my "2.55:1 isn't the OAR!" b!tchings and grumblings.
I was hoping, though, that they'd discuss why Disney decided to use Technirama instead of CinemaScope, which they don't get into much detail with. Also, I'm a bit annoyed that they don't really discuss the 2.20:1 70mm ratio that was used in the premiere and major engagements.
But at least now there's a more firm answer as to why 2.55:1 is chosen, and it thankfully doesn't sound like it's coming from a corporate mouthpiece trying to sell something.
Here's a few highlights from the full article...
- Theo Gluck, Director of Library Restoration and Preservation for Walt Disney Studios Motion Pictures has been kind enough to answer a number of technical questions regarding the new restoration of the animated Classic Sleeping Beauty, arriving on Blu-ray on October 7th.
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RAH: How was Sleeping Beauty photographed?
TG: Sleeping Beauty was shot using the successive exposure method. Given the SE process, when coupled with the size of a Technirama frame, the negative for Sleeping Beauty is over 7.5 miles long.
RAH: Can you briefly explain SE technology?
TG: Rather than use three-strip Technicolor to capture color images, the successive exposure system utilizes a single strip of black and white film and places the three color records in succession (next to each other). So each single color frame that you see on screen is in fact a "triple exposure" of the three successive frames of negative. This method is ideally suited to filming animation.
Instead of having three Y-C-M (RGB) records, the Sleeping Beauty negative could best be described as: Y1-C1-M1-Y2-M2-C2-Y3-C3-M3 and so on (albeit through RGB filters). This means that the linear length of an SE negative is three times that of the print that it generates.
Two key advantages to SE as opposed to three-strip photography is that the optical path is far simpler resulting in a single focal plane for each frame, and the alignment of frames from a single strip of film as opposed to three separate records is far easier. This is clearly evident when we are working with our nitrate negatives.


Sleeping Beauty negative images. (© Disney)
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RAH: What is the proper projected or viewing aspect ratio for Sleeping Beauty, and how was it ascertained?
TG: Well... there were multiple signs pointing us to presenting the film in a 2.55:1 aspect ratio for this Blu-ray release.
First and foremost - once our partners at Lowry Digital scanned the full image area on the Technirama negative and we started viewing dailies it became immediately apparent that we were not looking at a 2.35 AR. We normally do not have any crop applied when screening dailies so we knew we were seeing everything possible that is on the negative.
In addition - when we were looking at surviving cels and backgrounds at the Studio's Animation Research Library (which is an invaluable resource), it was quite obvious that the layout design and camera marks were set for 2.55.
Then there is the fact that in a memo dated July 28, 1953, the Studio green lit the CinemaScope version of Lady and the Tramp, while it also established a "Standard Version" and a CinemaScope Version production number for Sleeping Beauty -- #2082 and #2083. As the CinemaScope standard at the time was 2.55, (and that is clearly evident in Lady and the Tramp) Sleeping Beauty too would have been designed at 2.55.
In the end, Lady was adapted for CinemaScope but it was truncated on the left side of the screen when it went out with an optical track since the CinemaScope presentation spec had changed by the time the film was ultimately released in 1955. Sleeping Beauty fared far better as it had been designed to be in CinemaScope and thus could be trimmed to meet the requirements of 2.35 CinemaScope 35mm prints. But in the final analysis, there is animation all the way out to the far edges of the frame that had not been seen. It is this full 2.55 version that is coming out on Blu-ray on October 7.

Sleeping Beauty frame showing additional area now viewable at full original 2.55:1. (© Disney)
<snip>
RAH: What did you use as reference to color and densities, and if original cells, is there any loss over the years or do they look as they did fifty years ago?
TG: We are very fortunate in that we have access to the Studio's Animation Research Library (ARL), which contains millions of artifacts spanning the history of the company's animation projects. This includes production cels, backgrounds, and multiplane glass levels. We routinely select dozens of pieces that are then scanned, and split back out to RGB "SE" channels to then be recombined to emulate as best as possible the original photographic methods to ensure that the colors are reproduced much as they would have been (albeit without dye-transfer technologies). These newly photographed set-ups become our wedges that are given to our colorist (Tim Peeler at Technicolor Digital Intermediates) to further aid in this process.
Of course none of this work is done in an information vacuum since personal opinion foisted as fact never accomplishes anything. Hence the Restoration Team also includes colleagues such as animator Andreas Deja, and special projects director Dave Bossert, both from Disney Animation Studios, and Bruce Tauscher from the Mastering group. They bring a wealth of knowledge about the history of the techniques and the prevailing production conditions and thus help us ensure that we don't inadvertently alter the integrity of the original animation.
The cels themselves still retain the color. We have not seen anything that would lead us to believe that cels have faded severely or would in any other way not be representative of the original colors.
And speaking of Technicolor IB, on Sleeping Beauty (and other recent projects), I have been able to get us access to a dye transfer print to really help us understand how the prints were meant to be seen. There is no question that the original cels were designed with a color palette that accounted for SE photography and not for EK color negative. As this film is our first animated classic on Blu-ray we wanted to make sure we did everything possible to fully present the original splendor of the production.
<snip>
RAH: What element was scanned?
TG: We scanned the camera original SE Technirama negative.
RAH: Did the entire original SE negative survive and what condition was it in?
TG: Yes - the entire negative survives and it is in very good condition. In fact the vast majority of our negatives, even the nitrate material, are in very good shape.
RAH: How close to the desired final product did you and your group come with Sleeping Beauty?
TG: I think it came out exactly as we wanted it to be.
<snip>
RAH: Let's chat a bit about audio. What were the earliest extant elements and how were they handled?
TG: Although the film was released in 70mm back in 1959, the mix session documents and final mix audio elements we have in inventory confirm that the final mix was 4-track (LCRS), not six-track.
The paperwork also clearly shows which sequences had surround and which did not. Yet many people had very vivid memories of a "wall of sound" type of mix when they first saw it, and all of the original advertising (albeit taken with a grain of marketing salt) trumpet "six-track stereophonic sound".
RAH: Which would have been technically correct, as the prints were striped for six channel audio.
TG: Yes they were - and of course we know that there were 70mm releases that did employ 5 discrete channels behind the screen. As part of the audio research, we were able to locate a vintage 70mm print and run it in the Studio's Main Theater. We pulled the audio into ProTools at that time to better help our analysis. By listening to the tracks and looking at the wave forms, it was immediately apparent that when sounding the prints, Todd-AO blended tracks 1 and 3 into channel 2, and tracks 3 and 5 into screen channel 4 to flesh out the on-screen audio stage. In fact you could see quite clearly on the ProTools files how the levels gently sloped off from the center and tapered into 2 and 4.
<snip>
We ultimately made a new 5.1 mix, as well as a very special 7.1 stereo mix - exclusively for the Blu-ray version. There is also a new 5.1 and special 7.1 mix contoured for theatrical playback. Terry also cleaned up the original 4.0 mix for this release as well.
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RAH







