At 03:05 24 October 2019, 2G wrote:
On Wednesday, October 23, 2019 at 1:45:51 PM UTC-7, Charlie Quebec
wrote:
I know of several cases where the top layers of glass had to be
replaced
due to crack propagation. This was only confirmed by dry penetration
testing.

What, exactly, is "dry penetration testing?"

I think that it is Aussie code for "dye penetrant"