Silicone Ink

Two components go into every batch of silicone ink: a silicone base and a platinum catalyst, mixed shortly before printing because the pot life usually runs four to eight hours before the mixture starts curing on its own, printed or not. Once cured, the film elongates 400 to 800 percent before it tears, several times what a standard plastisol print can take, and it chemically bonds to slick synthetics like nylon and spandex that plastisol just beads up on. Cure temperatures land close to standard plastisol range, roughly 280-320°F, though shops often flash in stages to avoid scorching thin technical knits.

Swimwear brands, compression-gear makers, and cheer and dance uniform shops specify this ink for exactly that reason: a logo printed in plastisol on an 88/12 poly-spandex legging or a nylon swim jammer will crack and flake within a handful of wears, while the silicone version keeps moving with the fabric. We watched a client's chest logo on stretch cheer briefs survive twenty wash cycles in silicone after the same art in plastisol had spiderwebbed by wash six.

Because the catalyst starts working the moment it's stirred in, shops mix only what a run needs and plan press time tightly around that window. Mesh counts stay low, generally 60-86, since the base is thicker than plastisol and needs the wider opening to lay down evenly. Expect a real premium over standard ink — raw materials and slower setup both cost more, so silicone gets reserved for garments where genuine stretch performance is the point.

The mistake we hear is buyers assuming a stretch additive stirred into plastisol gets them the same result. It adds some give, but nowhere close to silicone's true elastomeric flex, and cut plastisol still won't bond to a slick synthetic surface the way a real silicone system does.