"He who marches out of step hears another drum." ~ Ken Kesey
If these are the 100% polyester performance fabric, I would really recommend the Wilflex line of Top Score inks if you can get them in time for the job at hand... they print very nice...all colors I've used...lower cure temp.
A 'nylobond' additive isn't going to work for blocking dye migration....it's meant to give ink 'grip' on nylon, especially woven...think jackets... Additionally, this product has a 'pot life' when added...so it's use it or lose it so to speak for the ink it's been added to.If these are the 100% polyester performance fabric, I would really recommend the Wilflex line of Top Score inks if you can get them in time for the job at hand... they print very nice...all colors I've used...lower cure temp.I also wouldn't recommend a black under base... I think that's just asking for a headache.