I have Googled in vain to find out whether it is possible to easily buy reasonably large (say 1m x 0.5m) sheets of glassfibre material 0.8mm or 1mm thick without any copper cladding.
I want to make some A1 sized portfolio cases for keeping drawings and artworks in.
In the past I have obtained small panels from PCB manufacturers who etch off the coating, but that seems a rum way to go about it.
Ian Phillips