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Re: [ARSCLIST] stability of shellac disks
From: Patent Tactics, George Brock-Nannestad
> After many seasons, the lead or wood weakens, and the glass
> begins to bulge.
>
> Lance Watsky
------ the lead will not weaken, because it has a self-annealing property
that is very active at the very low rate of change. Glass will not bulge - it
breaks. That may be seen in houses that have a sinking corner (eventually
making the windows into parallelograms). The panes do not follow the change
of shape.
Kind regards,
George