I've only used June Taylor fabric sheets, so we may be talking apples and oranges. On the June Taylor ones, you print it, wait for 10 minutes and then iron it well with a dry iron to set the ink (I used my HP color printer which has water soluble ink). If you plan on washing the item, you soak the page in water and then pat it dry it with a paper towel. Then, you iron it dry with a dry iron.
I found the June Taylor instructions on Youtube.com. You might find the instructions for your product there as well.
By the way, the pigment inks are less likely to run.
Here's a list of printers that use pigment based ink
https://laserinkjetlabels.com/pages/pigment-based-inkjet-cartridges/.