it can only be used sa polyester shirts. pwede rin pong 50/50. tas sparayan mo daw ng white rain na hairspray, tho personally havent tried that yet. :)
magkaiba po ang transfer paper for light and dark shirts. you can actually use a regular iron if the designs are small. kapag malaki po it will affect the quality.
also, sublimation paper is cheaper than transfer paper for dark. there is a subli dark paper but it is too costly. 160 per pc sa kin. pero it will also work with cotton.