source for white plexiglass?

[stradibarrius]

When I made my light box all I could find was clear plexiglass so I covered the underside with tracing paper. It works fairly well but would like to get a pice of white.

 

[Peter De Smidt]

Any place that can order plastic sheet can get it. In my case, the home improvement, paint and glass stores carry it or can get it. There's always http://www.usplastic.com/catalog/default.asp if there isn't a local source.

 

[DWThomas]

I don't think it was Plexiglass (acrylic), but the home centers years back carried a plain translucent white panel as part of an assortment of diffusers for fluorescent ceiling fixtures. I haven't noticed it lately but haven't been looking. The sheets were about 24 x 48 inches as I recall -- not real thick, maybe .093 or 0.1 inches. I still have a partial sheet I used to use to backlight and shoot taped circuit board layouts with a 4x5 to get negatives (ah the good ol' days!)

 

[epatsellis]

Any signshop will have or can get either acrylic or polycarb/Lexan. There are two different types available, (from memory, may be off..) 35% transmission and 65%.

 

[Dan Henderson]

several years ago I bought a very large sheet of translucent plastic at a local glass shop. I have used it for other purposes over the years, and recently built a lightbox into my darkroom counter using a section of it.

 

[Q.G.]

I got mine from a DIY/hardware-shop.
Several bigger of these shops carry sheets of acrylic/plexi in several variations over here.

 

[richard ide]

If you ask for "sign white" acrylic sheet you will get what you want. It comes in different degrees of transparency. Rohm & Haas also had available several grades. The idea of using a fluorescent light diffuser is probably the cheapest.

 

[stradibarrius]

I didn't think about a sign shop! thanks

 

[MortenDK]

Signshop is also my first thought, but the fabric they use to make spinnakers for sailboats is also excellent. White, diffuse semi translucent, lightweight, strong and rel. cheap.

 

[Mark Fisher]

A local glass shop will have it too.

 

[Rob R]

When I needed a sheet of white plexi I tried the sign shop route with no luck. However you may find that there are one or more plastics manufacturers in your area. I found one in town that sold plexiglass in full sheets as well as smaller cuts in a variety of colors.