Is there any other process besides radium carving?

Here is to explain the characters in addition to radium engraving other processes.

Character transmittance is generally sprayed radium carving and hollow screen printing two.

Spray radium carving: character light transmission, edge light leakage, high cost;

Hollow screen printing: character light, edge light leakage, lower cost.

Due to edge leakage, hollow screen printing silica gel products will generally want to shield. And these two processes of silicone products themselves are not luminous.

By the way, there's also a process that makes the silicone products themselves glow. This process is mainly in silica gel inside the addition of phosphor, so as to make the product itself glow.