as i prof printer

, it depends also on teh quality of your t shirt and printer, not just the paper.
my fav pale paper comes from asda, and has irons on the back that change colour, v easy to use!
dark paper must be brought on line or at a specialistshop )hobby craft/pc world)
get a good quality printer

t shirts should be washed withour fabric softener it makes the cooton absorb better, best t shirts are fruits of the loom, which are often used y proffesionals....
if you are doing these for a disney trip...dont! i ended up doing 14 each (14x5=too many

) works out an expensive (if funny

) hobby!!
tracy