21fjp22a Crt Question

[John Folsom]

I am restoring a RCA TM21B studio monitor. The monitor was "upgraded" to a 21FJP22A CRT. The CRT has a terrible cataract, so I removed it and found that the safety faceplate just fell of when I remover the tape around the perimeter of the CRT, and the entire cataract film just pealed off. This is a good thing. But the safety faceplate appears very fuzzy when you look through it, even though both surfaces have been cleaned. When a small puddle of water is placed in the concave bowl of the faceplate, the view through the water and faceplate is clear again. I assume that this means the clear bonding agent they used between the faceplate and the CRT acted as a wetting agent for the back surface of the safety glass. I am also guessing that the safety faceplate is some kind of filter glass...? Anyone know about the safety glass on this CRT, and what bonding agent I might use to put it back on?

Thanks.