A glossy translite clings to the backbox glass in patches, leaving cloudy blotches and bubbles when lit.
Translite blotchy where it sticks to the backbox glass: add a small air gap
Cause: The glossy print is pressed flat against non-porous glass, so it sticks in places, the same problem framers have with glossy photos.
Checks
- Look at the lit backbox from an angle for wet-looking patches where the print touches the glass.
Fix
- Hold the glass slightly off the translite with a few soft spacers between the light box frame and the glass at the top (short pieces of drinking straw were enough here), then refit the top trim.
Systems
Source: Pinball Repair help group!! (Facebook group)