Marc, Matteo

Today we received 2 25 kg substrates grown by AZTEC and repolished by Sigma Koki.

We applied first contact on one of their surfaces and will apply on their other surfaces later today.

On each mirror barrel there is written 'top' followed by some characters.

We added the mirror number (1 or 2) as well as an arrow pointing towards the 'top' sign.

We will use this as our reference for the top part of the mirror during measurement.