Our testers reported ,
The rods are even and consistent with no visible air
bubbles or inclusions. I found that it was slightly 'shockier' than I am used
to with boro clear; introducing a slightly jagged end of the rod suddenly to
the flame resulted in small pieces popping off. However, once warmed, it works
just like any other clear boro without any real boiling issues and good clarity
and stability in the finished pieces.