found this on the hot glass BB and thought it may be of value to us during the edge gluing process and working safely
"I have been told The HIS site actually has some issues in that it does not caution you to wear gloves all the time and a very good organic vapor respirator. It is not stuff to be taken lightly.
When I mix hxtal, which is a three to one ratio, I mix at about 75 degrees and stir it really hard. Then I put it in a microwave - time depends on quantities. The goal is to get it up to about 100-104 F. Then it is put in a vacuum chamber for about ten minutes. Prep the surfaces to be joined with A-1100 which is a .5% mix of xylene in 90 percent isopropyl alchohol. It gives the surfaces "tooth" as Charlie Parriott used to say. Xylene is no joke either so keep that mask on. We ventilate the room where we do our glue ups and anyone who tells you that it doesn't need good venting is simply wrong.
We then put the work in a heated space, usually built around the piece and keep it at about 105F minimum for the next 24 hours. We use light bulbs. Then, clean up and do it thoroughly. What you don't get now will be really hard to get off. It takes a full 7 days to set but the piece can be moved around and shipped if necessary after 36 hours.
It may sound like a pain, cuz it is but if you need a perfect joint, It's the stuff that does it.
Mixed hxtal can be put in the fridge where it will keep for a long time. I prefer fresh batches."
