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| NEWS |
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OUR PARTICAPATING IN OPTICAL FAIRS ::
SPECIALITY
PRODUCTS ::
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| 1.523 Crown White Blank |
| Item |
White |
Cruxite |
Crookes |
| Color |
White |
Pink |
Blue |
| Refraction
Index (Nd) |
1.523 |
1.523 |
1.523 |
| Double
Refraction Index (nm/cm) |
<
70 |
<
70 |
<
70 |
| Density
(g/cm3) |
2.53 |
2.53 |
2.53 |
| Transmission
for White Light |
>
91% |
>
86% |
>
84% |
| Abbe Value
(Vd) |
58 |
58 |
58 |
| UV-ray
Cut-off |
330
nm |
350
nm |
340
nm |
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