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SUPREMAX® BLANKS
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FINE ANNEALED BLANKS are borosilicate glass disks,
extracted from a plate of Schott Supremax® with a low coefficient
of thermal expansion (3.25x10-6/°C) while the standard glass (sodic calcium )
has got 8.5x10-6/°C.
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The raw glass disk is first levelled and then its edge is
grinded down, to get a curve edge surface perpendicular to flat
faces.
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To obtain blanks with a concave surface, we first give it a
spherical shape with the requested radius; the blank is then treated
for fine annealing process that lasts 72 to 120 hours, depending on disk
diameter and thickness. All stresses coming from the fast cooling of the
vitreous cast mass are removed; the blank optical surface is then flattened
again and roughly shaped to the requested concave surface.
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The blank is now
ready for next glossing phases.
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Supremax® Blanks
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Blank in inch dimensions |
Blanks in metric dimensions |
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Code |
Diameter
Inch |
Thick.
Inch |
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Code |
Diameter
mm |
Thick.
mm |
Price
Euro |
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BI1015 |
10"(*) |
1.5" |
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BM25538 |
255(*) |
38 |
248.00 |
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BI10175 |
10"(*) |
1.75" |
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BM25545 |
255(*) |
45 |
280.00 |
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BI1215 |
12"(*) |
1.5" |
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BM30538 |
305(*) |
38 |
295.00 |
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BI12175 |
12"(*) |
1.75" |
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BM30545 |
305(*) |
45 |
344.00 |
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BI1221 |
12"(*) |
2.1" |
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BM30552 |
305(*) |
52 |
382.00 |
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BI1415 |
14" |
1.5" |
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BM35538 |
355 |
38 |
509.00 |
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BI14175 |
14" |
1.75" |
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BM35545 |
355 |
45 |
567.00 |
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BI1421 |
14" |
2.1" |
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BM35552 |
355 |
52 |
617.00 |
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BI1615 |
16" |
1.5" |
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BM41038 |
410 |
38 |
747.00 |
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BI16175 |
16" |
1.75" |
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BM41045 |
410 |
45 |
795.00 |
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BI1621 |
16" |
2.1" |
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BM41052 |
410 |
52 |
885.00 |
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BI1815 |
18" |
1.5" |
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BM46038 |
460 |
38 |
906.00 |
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BI18175 |
18" |
1.75" |
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BM46045 |
460 |
45 |
1023.00 |
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BI1821 |
18" |
2.1" |
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BM46052 |
460 |
52 |
1192.00 |
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BI1825 |
18" |
2.5" |
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BM46063 |
460 |
63 |
1410.00 |
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BI2015 |
20" |
1.5" |
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BM51038 |
510 |
38 |
1130.00 |
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BI20175 |
20" |
1.75" |
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BM51045 |
510 |
45 |
1267.00 |
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BI2021 |
20" |
2.1" |
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BM51052 |
510 |
52 |
1367.00 |
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BI2025 |
20" |
2.5" |
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BM51063 |
510 |
63 |
1738.00 |
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BI2215 |
22" |
1.5" |
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BM56038 |
560 |
38 |
1208.00 |
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BI22175 |
22" |
1.75" |
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BM56045 |
560 |
45 |
1383.00 |
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BI2221 |
22" |
2.1" |
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BM56052 |
560 |
52 |
1574.00 |
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BI2225 |
22" |
2.5" |
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BM56063 |
560 |
63 |
1288.00 |
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BI2415 |
24" |
1.5" |
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BM61038 |
610 |
38 |
1420.00 |
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BI24175 |
24" |
1.75" |
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BM61045 |
610 |
45 |
1654.00 |
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BI2421 |
24" |
2.1" |
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BM61052 |
610 |
52 |
1887.00 |
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BI2425 |
24" |
2.5" |
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BM61063 |
610 |
63 |
2480.00 |
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BI25175 |
25" |
1.75" |
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BM63545 |
635 |
45 |
1780.00 |
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BI2521 |
25" |
2.1" |
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BM63552 |
635 |
52 |
2030.00 |
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BI2525 |
25" |
2.5" |
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BM63563 |
635 |
63 |
2692.00 |
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BI28175 |
28" |
1.75" |
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BM71045 |
710 |
45 |
2310.00 |
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BI2821 |
28" |
2.1" |
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BM71052 |
710 |
52 |
2703.00 |
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BI2825 |
28" |
2.5" |
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BM71063 |
710 |
63 |
3360.00 |
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BI3021 |
30" |
2.1" |
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BM76052 |
760 |
52 |
3095.00 |
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BI3025 |
30" |
2.5" |
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BM76063 |
760 |
63 |
3900.00 |
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BI3221 |
32" |
2.1" |
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BM81052 |
810 |
52 |
3625.00 |
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BI3225 |
32" |
2.5" |
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BM81063 |
810 |
63 |
4590.00 |
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BI3621 |
36"(**) |
2.1" |
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BM91052 |
910(**) |
52 |
4750.00 |
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BI3625 |
36"(**) |
2.5" |
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BM91063 |
910(**) |
63 |
5894.00 |
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BI4025 |
40"(**) |
2.5" |
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BM101063 |
1010(**) |
63 |
7055.00 |
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Standard tolerance on the diameter are +1.0mm -2.0mm, on the thickness are ±2.0mm.
Orders are confirmed on receipt of an advance of 15-25% of price list.
Packing is included on the price, excluded vat and delivery cost.
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The price of our own production blanks includes the
packaging cost; here's a typical packaging of a 510mm Pyrex blank.
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Packaging of three 40" (1013mm) Pyrex disks
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Vertical packaging of three 30" (760mm) diameter glass disks
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REGINATO Via Fantin, 121/B - 31035 Crocetta del Montello (TV) - ITALY
Fax +39 0423.660680 - info@reginato.it - P.Iva 03403370269
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