Best Boro Black?

[caliglassguy]

I'm wondering if there's a boro black that won't get devit or discolor when being squashed, cut, reheated and shaped. Maybe Raven which I don't have yet. Tried jet and onyx. Maybe I'm doing something wrong too much oxy? Any suggestions appreciated.

[LarryC]

Most blacks will grey a bit when they are reduced. Sounds like not enough Oxy to me. I use TAG blackjack. Not extremely dense but it works easy almost like clear. It will also grey if you work it in reduction.

[Dragonharper]

With boro too much oxy is almost never a problem, unless you are working with reduction glass.

[Karen Hardy]

I love raven. It's my go-to black.