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Diamond D7 User Manual Page 33

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Materials Material designation Density Hardness Refractive Softening Remarks
in industry acc. to Schott class index n
d
temperature
g/cm³ kg/mm² C°
Precision Fluor crown glass
optics
Spectacle FK1 to 2.31 370 1.47069 390 Material removal properties:
lenses FK54 3.18 320 1.43700 403 splintery chipping of larger workpiece
General particles at comparatively high
engineering Boron crown glass machining forces.
BK1 to 2.46 480 1.51009 547
BK10 2.39 490 1.49782 532
Crown glass
K3 to 2.54 470 1.51823 521
K51 2.47 460 1.50518 521
Dense crown glass
SK1 to 3.56 490 1.61025 650
SK55 3.35 550 1.62041 605
Lanthanum crown glass
LaKN6 to 3.80 460 1.64250 634
LaK33 4.26 640 1.75398 664
Flint glass
F1 to 3.65 350 1.62588 432 Containing lead oxide, tends to
F15 3.48 390 1.60565 433 plastification and breakout of large
flaky plastic particles, problematic for
Dense barium flint glass grinding layer with little chip space.
(acc. to König, Steffens, Kleinevoss,
BaSF1 to 3.66 400 1.62606 493 AIF Report No. 6242)
BaSF64 3.20 540 1.70100 580
Lanthanum flint glass
LaF2 to 4.34 480 1.74400 644
LaFN28 4.24 630 1.77314 668
Dense flint glass
SF1 to 4.46 340 1.71736 417
SFN64 3.00 500 1.70585 578
Spectacle Phototropic glass With halides, also known as
lenses photochromic glass.
Mineral glass 2.41 to 480 1.5229 to 510 Trade names: Colormatic,
2.5 +/- 30 1.6000 Fotosolar, etc.
Plastic resin 1.32 1.502 Organic glass. Trade names:
(CR39 polymers) Perfalit-Colormatic etc.
Plastic glass Polymerized casting resin
(thermosetting), see plastic resin.
Organic glass 1.32 1.502
Large optical Ceramic glass 2.53 600 1.5430 Schott Name: Zerodur for tele-
systems scopic mirrors, geometrically stable
from -273 to +600° C.
Technical Quartz glass 2.2 710 1.4588 Melting point:
glass 1710° C
General technical notes
Glass materials
and related products
Tabular overview
diamond tools
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