Mary , the secret of permeating the canvas discussed a while back , was to
thin the T2 ... or whatever you were using ...
There are so many styles of canvas available , you just need to find the kind You like ... Preferably I’d like to use a good Linen canvas ...twice as strong as cotton , more durable , and Much more expensive ...

I used Linen on my little Foamie , because I had it already ... (left over from “painting” ) Still in perfect shape after all this time outside ...
KC , I believe the single weave is a 1/1 thread ratio where as the double weave is 2/1.... 2/1 having more thread is “heavier" , more dense ... the term seems to vary from manufacturers, so is really not dependable ... Visual inspection is the only way to find what you want ...
Just for S&G , here ’s a link to Artist canvas... which tends to be PRICY !!!
http://www.utrechtart.com/Unstretched-C ... as.utrecht More ...
http://en.wikipedia.org/wiki/Warp_(weaving)
http://en.wikipedia.org/wiki/Double_clothhttp://en.wikipedia.org/wiki/Plain_weave