Clarification:
The clear aloe vera gel or diluted FABRIC MEDIUM activates the color. Heat set when dry. Wash out the aloe vera gel/fabric medium.
Then apply GEL MEDIUM brushing only on the watercolored areas. This makes the color permanent...more than just heat setting...especially if it will be washed.
Gel medium is different than aloe vera gel. Buy it at Michael's or an art supply store.