Actual purpose of dag coating?

[Yamamaya42]

Originally Posted by Electronic M

Slipplate is a good replacement coating. Generally you want to avoid dag islands as they can arc to each other and cause picture disturbance/video noise, and if arcing between islands (or between the dag and a poorly contacting ground strap) is constant and bad enough it can unevenly heat the glass and cause implosion.

dag islands ? aren't they just off the coast of Florida?