Loading ...
Sorry, an error occurred while loading the content.
  • Back
  • About Group

  • Join Group
No activity in last 7 days

Group Description

The purpose of this community is to support interest in the high temperature firing of vitrified substrates for use in making telescope mirrors. This includes slumping, fusing, casting, annealing and any other process needed to produce high-quality optical instruments. We are also committed to exploiting meniscus mirrors and the flexing technology popularized by Alan Adler as a result of the research done by Eric Reissner.

We design and build equipment, develop substrate formulations and encourage the safe and cost effective use of kilns. What we are about is sharing anything that furthers our ability to make great mirrors for great telescopes.

The rules here are few but simple: Be nice! Respect your audience! We are very tolerant but not of any behavior that comes at the expense of others. Any Individual who fails to adhere to these simple rules will be denied access to this site.


The photograph above shows some of the tools used to perform a "Pot Pour" whereby molten glass cullet drops from a earthenware pot down onto a mold.

The white pieces are refractory inserts, molded and shaped to produce a honeycomb of hexagon pockets. The diamond hole saw used to enlarge the exit in the pot is shown as well as the tile faced tool which will be used to grind a sphere in the finished blank.

Group Information

  • 82
  • Crafts
  • Nov 6, 2011
  • English

Group Settings

  • This is a restricted group.
  • Attachments are permitted.
  • Members cannot hide email address.
  • Listed in Yahoo Groups directory.
  • Membership requires approval.
  • Messages are not moderated.
  • Anyone can post messages.

Message History