I am working on a photo quilt, I used a recipie from crafster.com that you use, washing soda, alum downey fabric softener and water and make your own setting rinse. So far I am pleased and the ink did not wash out.
If money is not an issue you can buy pretreated fabric. Look in the tshirt craft area of joanns , the photo fabric there is much cheaper than it is in the same store in the fabric/quilt section,like 6-8 bucks a pack . If you can afford it it is much less work all you do is print ,peel the paper off and then rinse with tap water. crafters images is one I have used and is by far the easiest, and it has held up nicely.
Oh and Do Not let the facility wash it!
I think the 4x6 size was 8.99 for 12 sheets and the 8x10 was 12.99 for 6 sheets. the ones in the quilting section were starting at 18.99 for 5 sheets for the pretreated kind, I did have good luck with the homeade recipie though ,much cheaper but way more time consuming.
Rae