it is really rate to see blue and yellow sleeve and white body. I am afraid finished tees will not be good for dying again, it is difficult to handle. Get 3 different colors fabric, and sew them all into a tee.
You could always dip dye, maybe using a wax resist or something on the edge so you get clean lines. Like PJ said... tedious, but not impossible (just crazyAs far as I know, the entire colorless fabric is washed, bleached, and soaked in tank for a dye bath at high temperature
Yes, I've heard of dye baths at room temperatures.Full immersion dyeing is not the only way to dye fabric or garments nor do all dyes require high heat. Where there is a will, there is always a way. And it does not have to involve a printing process (although it can as dyes can also be printed).