Kryolith White is named after the kryolith chemical in it. This whie stays warm longer and is excellent for sculpture and hollow work. Does not shock or crack like Effetre white and is a pure white not a white mixed with clear to save on manufacturing costs. 6 to 8 mm. Photo at bottom shows the all white rods. This needs to be annealed at 980 degrees if you are mixing it with anything else!
Lauscha white is very compatible with other 104 glass. I have made over 500 beads with it. But it has to be annealed at 980 degrees.
