I print on a lot of cotton/spandex ladies tanks these days. They sell well.

When I used plastisol, I didn't have to add anything special. Suppose it depends on the ink manufacturer.

Funny thing, I experimented with adding small amounts of stretch additives, when I was still using plastisol, and I could get the print to crack every time. Never with straight plastisols. Weird.

Since switching to high opacity WB inks, I also don't need to add anything.

I know that doesn't address 100% spandex, but cotton/spandex tanks are pretty popular these days.

Supposedly also, with the Permaset High opacity inks, you can print on any material - nylon, whatever, and it needs no additives to cure correctly. Of course it is WB and I have not used it on anything other than the cotton/spandex tanks and 50/50 garments.

 

Spandex is actually a woven rubber like thread that is knitted in with other materials to give them stretch capabilities. So you would need to know what the other material is to make the determination of inks to use. I never have had a lot of luck with stretch additives. If a softer hand is needed use a reducer and higher mesh counts. Definitely use a true 100% poly white or gray blocker on colored 65%-100% polyester, don't skimp here. Pretty much gone are the days of nylon but you can use regular plastisol with an additive. However it is best to use a nylon ink and even then catalyst needs to be used as well. I use a LB 50/50 white on 100% cottons as well as the 50/50's. The only thing you have to watch here is that for some reason it take a little more heat to cure on the cotton. Not an issue though. Hope this helps. Good Luck.

 

Hi sir, if you can, try it in Linen fabric Linen fiber is very absorbent and garments made of linen are valued for their exceptional coolness and freshness in hot weather.