have you experimented with the picture you printed??? heat set it? set it aside to cure...take it to the sink and run cold water through it, see if the ink comes out or not...it really should depend on the permenence/quality of your ink whether or not this fabric will be ok or not.
is it cotton?
i have lots of (dry clean only's) that get washed all the time...without problems....
if the ink does run when cold water is ran through the picture i would only use those fab=sheets for wall hangings or items that will not need laundering.
i hope it does not wind up being a waste for you