30+inch+F3+Purchasing+the+mirror+blank

The mirror blank for the 30 inch F3 was purchased from Reginato in Italy. The mirror material is Supremax33 and the blank is supplied fine annealed. Reginato are great to deal with and I have had a few mirror blanks from them recently.

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The blank supplied was 55mm thick at the edge and generated to F3 on the front surface. The quality of the surfaces and edge are good and fine grinding can be started with around 15 micron microgit. No need for large grit sizes! This saves a lot of time.

Delivery was less than 3 months following placement of the order. The mirror arrived safe in a well constructed and strong 3/4 inch ply box. This is lined with thick strong packing foam and bubble wrap. The box gross was 70Kg with the mirror being 50Kg.

Cost for the blank in Euros was 3520 (2014 prices). Cost breakdown was:-
 * 3172 for the blank
 * 242 for the generation
 * 106 for the shipping

Image below is of the blank on arrival. A quick check inside to see if all is OK. The blank arrived in September 2014. No work was started until the 7th April 2015 due to my father being very ill and passing away late December 2014.