Hilgenberg (Malsfeld, Germany) currently offer their remaining stock.
Zitat von James Holton <[log in to unmask]>:
> Does anyone know the formula or supplier of what was once called
> "Lindemann glass"? It is a silicon-free high-boron glass that has
> no elements in it heavier than oxygen. Used to be used to make
> clear x-ray windows, but now I can't find anyone who sells it.
> -James Holton
> MAD Scientist