Quote:
Originally Posted by Garyh
Thanks for the reply Blue Skies, is there any particular way to figure a plate glass mirror? like what is the difference in figure from a warm mirror just figured to a cooled down one..if the mirror showed overcorrection when warm would it settle closer to correct or would it tend to be more overcorrected when cool?
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What Cristian just said above
I guess what I was trying to say is that your hands do transfer some heat into the glass when you're holding it so there is a possibility that the glass might heat up a little to much while you're figuring and then when it cools the figure is different to what you were aiming for, so the progress is slower.
As for glass - I suppose if you can afford the pyrex-type stuff you should go for it, especially since you only want to make a medium size mirror anyway, but if the plate glass is handier it's still do-able. The plate is softer so progress will be quicker, so if anyone else is reading this and tends to be impatient but wants to give mirror making a go with something in the 6" to 8" range the plate might suit your needs better.