What screen material for projection?

[protos]

I am trying to have a projection screen made more cheaply by a shop that does rolling tent type constructions.
My question regards the reflectivity of the screen material.The usual heavy vinyl they use for outdoors seems reflective and i am afraid that there will be some hot spots reflected to the viewer.
On the other hand a thinner non-reflective material seems nice but is not completely dark-you can see some light if you hold it up against the light.This will be used indoors of course.

 

[cookie]

I used Triple pass blackout cloth. It is like a really fine smooth suede on one side. I ordered it for $5.95 a yard. two yards will give you a screen 54" x 72". I got it from House of fabrics at the following link

http://www.housefabric.com/ProductDetail.asp?ProductID=848


Here are some pictures of my Proxima 944 projected on the Triple pass blackout cloth

An externally hosted image should be here but it was not working when we last tested it.

An externally hosted image should be here but it was not working when we last tested it.

An externally hosted image should be here but it was not working when we last tested it.

An externally hosted image should be here but it was not working when we last tested it.

You can see more pictures at my website

http://mysite.verizon.net/yub_yump/

 

[protos]

I don´t think I can get this product here.
I still wonder if it is ok to use a vinyl that is shiny with no light pass thru or a more matte type material that has no hot spots but may pass some light thru(does this mean less gain?).