International Coatingssorry I should have asked what brand and # ink are you planning to use?
Some companies make a neon/fluorescent ink that can only be printed on white or with an underbase. Others make Fluo inks that have opacity to them so it's possible to direct print with them(p/f/p). Either way I would underbase the design so the color really pops.
Do you have an idea of what brand you want to use yet?
Yes... please do .... .would love to see themI'm currently using Excalibur inks for my fluorescent ink colors. I mostly print on polyester now so I get fluorescent colors custom made in their 1550 base. For cotton I have their stock 500 series.
I will post some pictures of the inks as well as prints with them when I get a chance.