What is the significance of the white, blue, and black colors of the caddies VideoDiscs come in?
The color of the caddy often indicates some information about the disc inside. White caddies are the most common, and usually indicate a monophonic, non-interactive disc, but some of the later stereo and dual soundtrack releases came in white caddies, and some of these releases appeared in both white and blue caddies. Blue caddies indicate the disc is recorded in stereo sound or indicate the disc is a dual soundtrack (A/B) title. Black caddies are far less common than white and blue, and were intended to indicate an interactive disc, although Disney released their seven “limited gold edition” titles in black caddies. Black caddies were also used on some discs not intended for public dissemination, such as RCA test pressings and dealer demonstration titles. Some gray caddies also exist, but these are so rare that most collectors have never seen one. RCA intended to use gray caddies for their industrial training disc program, but this program was only implemented to a limited degree.
