http://www.biopacindia.com/products/foam-boards.aspx
Indian manufacturer of paper coated Depron foam
I don't think it is meant for RC
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It is just that you have not used it.
Dear moghemv
The BioPac Alphaboard is very heavy and if you will build a model completely out of it, it will most certainly not fly well, if it all it will.
For what you need is a lightweight paper baord like :
http://www.vortex-rc.com/product/fliteboard-pro-10-sheet-pack/
Read more here :
http://www.vortex-rc.com/2016/09/01/foamboard-comparion-review/