you do not want to add starch to your fabric- the fabric should be pre-washed then dried with no fabric softener or any additive- unless using Bubble Jet set- or some sort of (prepared for dying additive-) but you do not want to add starch, sizing, fab softener- anything like that- the premade sheets come in a variety---some are washable some are not-
you can purchase fabric that is (prepared for dying) that works well.
make sure you are using quality- permenent ink- the pigma inks are better than water soluble inks. do not use refills, or off brand cartridges.
the HP and Epson printers have the most (dependable) inks-and printers.
after printing- set the fabric aside to *cure* -allow the ink to saturate the fibers- then heat set.
it takes some experimentation-
i make lots of labels this way- i iron the (prepared for dying) fabric to freezer paper- cut it to size of printer paper- and run it through- set aside for 24 hours- then heat set & set aside again- the next day i run cold water through it and see what happens- reds tend to run the easiest- i've had labels that are still read(able) 6 years later- i have labels that after 2 or 3 washes are pretty faded away- if i have one that fades i usually go over it with a permenent marker- oh yea---ink jet printers---not laser printers--- it's all in the ink---and the fabric preparation.