Can I use acrylic paints without the "fabric" additive?

It may make the fabric more stiff, than if you dilute it with the fabric medium.

for wall hangings; art quilts

Without the medium the color may not hold true. The fabric medium holds the paint color. Acrylic paints need to be heat set using a iron. Hope this info helps.

Thanks for your answer about thread painting with acrylics...as evident, I know nothing about this, so...what is fabric additive? :oops:

I believe the medium has something to do with the washability of the fabric. I could be wrong though.

Fabric Medium is necessary for the paints to pentrate the fabirc and stay true to color.
Meduim helps keep the painted painted ares soft. Will be a little thicker feeling than the unpainted fabric.