protected cold frames
Thu, 22 Jan 2009 19:18:30 PST
On 21 Jan 2009, at 11:07, Jane McGary wrote:

> Regarding cold frames, UIi mentioned "polycarbonate (Plexiglas)" but 
> I think these are two different things, at least as the terms are 
> used in North America.

Plexiglas is polymethylmethacrylate, and is a fairly old product. Lexan is a 
polycarbonate and was first introduced in the early 1960s.

Rodger Whitlock
Victoria, British Columbia, Canada
Maritime Zone 8, a cool Mediterranean climate
on beautiful Vancouver Island…

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