So I did some investigation over the last few weeks on a quest to find *any* soy-based textile printing ink. And there is one... and so far only one.
I just got off the phone with a sales rep from
One Stroke Inks and got some information on their SoyMax ink. It's a plastisol with I think around 80% soybean oil.
They're sending me a few samples so I"ll give it a shot and see how it prints once I get the inks. I'll post some results on here.
Not sure if anyone has already known about this ink and i'm just late to the party... so i'm just puttin' this out there.
Here's a link to the SoyMax spec sheet:
soy oil-based ink 
