Quoted from Nihonmasa:The guy had 2, and both backglasses are different. Any idea as to why?
This is a four-color process glass. There has been a lot of discussion about color changes in Bally backglasses. These are incredibly small dots of color put together to create a hue. If the glass or screen are misaligned even by thousands of an inch, color variations will occur. This is due to the colors overlapping behind the 1st screen, 2nd screen, and 3rd screen. Bally was able to make these type of backglasses in CMYK, or four passes. Other discreet color backglasses sometimes have 6 or 8 different colors. This saved Bally money, and also increased the contrast of the images they could produce. Win Win at the time.
Dickinson, TX
