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New Glass Types


L-BAL43 is an optical glass with similar properties to L-BAL42, that has been optimized to enable mold pressing at a lower temperature by a reduction in the softening temperature. As with L-BAL42, the new L-BAL43 glass can be supplied as Fine Gob (FG). This low softening temperature L-BAL43 glass will allow our customers to reduce the total molding costs through supplying in FG form in addition to reduced production lead time, increased mold tooling life, and lower power consumption.

  L-BAL43 L-BAL42
Eco Optical Glass
Refractive Index nd 1.58573 1.58313
Abbe Number νd 59.70 59.38
-30~70°C 72 72
+100~300°C 90 88
Transformation Point Tg(°C) 493 506
Yield Point At(°C) 535 538
Coloring λ80 340 340
λ5 285 285
Chemical ResistanceRW(P) 1 2
RA(P) 4 4
W(S) 3


SR 51.4 5.2
PR 2.0 2.0
Specific Gravity 3.05 3.05
Knoop Hardness Hk 610〔6〕 590〔6〕
Abrasion Aa 115 113
Detail Catalog DATA PDF PDF
Available shapes
•saw cut center-less
groundcylindrical blanks
•polished ball
•cut blanks

•saw cut center-less
groundcylindrical blanks
•polished ball
•cut blanks

Please consult us about available size and tolerance.

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