Oz color difference

[old_tv_nut]

I have a copy of "Colour Cinematography" (1951) by Adrian Cornwell-Clyne, which has an extensive section on Technicolor. It has a diagram of the printing machine. It gives some formulas for dyes, with a warning that they are presented for schematic purposes only and different ones may have been used. It gives no spectral curves.

The closest thing I have is a neutral density spectral curve that was published as part of a BBC paper in the mid 60s about the problems of low deep-red and infrared density of Technicolor dyes causing a red fog when televising these movies. This ND curve is convincing, as it shows the decreasing density towards deep red, which was also a known problem for Technicolor dye sound tracks that caused the use of a silver soundtrack instead. Unfortunately, there is no determinate way to separate the neutral density spectrum into the three individual spectra for Y, C, and M.

Edit: Regarding the variability when printing to chromogenic film, references say the Technicolor dyes were changed significantly in 1946, producing denser and more neutral blacks, and eliminating the need for a silver base image. Technicolor dyes (the later ones, I presume) were also said to produce better color than Kodachrome (which version, they don't say).

[stromberg6]

Thank you all for the replies! It's a learning experience, for sure. Let me start by saying that the TV does need an alignment of the chroma section, as it has trouble with blues and greens. The RF/IF sections provide a very good and sharp pic, so i won't go there for now.
The DVD I used is from the two-disc set of "Robin Hood" that Warner Bros issued a few years back, and the second disc has a feature about Technicolor, the 6th program including some scenes from "OZ". Today I found some time to run the DVD in my newest computer, and took a few shots. It seems that the camera adds purple and blue to the clouds and hills, but not too much. The shots from the TV are over-saturated, for sure, but not that far off from the clips on this particular DVD. As has been mentioned, perhaps different copies used different parameters, and that's why color is different, but my CTC-4 needs some help .
I've attached two shots, one from the monitor, and the other from the TV.
Thanks again for all the comments and info! It is much appreciated.

[cbenham]

Originally Posted by stromberg6

The shots from the TV are over-saturated, for sure, but not that far off from the clips on this particular DVD. As has been mentioned, perhaps different copies used different parameters, and that's why color is different...

There are 9 different commercially issued versions of OZ;
the same one on betamax and VHS, two on Laser disk, 4 on DVD
and the 70th anniversary editions on DVD and BluRay.

No two look the same.

Cliff

[cbenham]

Originally Posted by cbenham

There are 9 different commercially issued versions of OZ;
the same one on betamax and VHS, two on Laser disk, 4 on DVD
and the 70th anniversary editions on DVD and BluRay.

No two look the same.

Cliff

There are also PAL versions of some of these.

Cliff

[wa2ise]

Originally Posted by cbenham

There are also PAL versions of some of these.

Which is what you used to see when watching a telecast of the Wizard of Oz in Oz (Australia)... as Oz (Australia) used PAL.