Colour recovery from B&W kinescope films

[dtuomi]

Actually most B&W kine's of color shows in the U.S. were made with B&W picture tubes. I had an engineer mentor of mine who used to get stuck babysitting one when he was a bad boy at ABC. Apparently they used blue phosphors in the tube because the film they used was most sensitive to that color (even though it was B&W).

Anyway, NTSC is real easy to notch filter out, and everyone did it to prevent the color info from causing any unwanted "random" patterns on the films. So almost no kinescopes of American color television would even have any color information in them at all.

David