You must buy "Low-Bleed" or "Poly" inks. Polyester dyes can "migrate" into the ink when heated; low-bleed inks contain blockers to prevent your white prints from turning pink on a red shirt.
Look for "High-Elongation" or "Stretch" inks that can expand without cracking. 2. Check Your Curing Capabilities buy plastisol ink
Plastisol sits on top of the fabric rather than soaking in, so choosing the right chemical formulation for your substrate is critical to prevent cracking or "bleeding". You must buy "Low-Bleed" or "Poly" inks
Standard or "General Purpose" plastisol is ideal. It offers a creamy consistency and easily mats down cotton fibers for a smooth finish. It offers a creamy consistency and easily mats
When buying plastisol ink, the "best" choice depends heavily on your garment material and your shop's curing equipment. Unlike water-based inks, plastisol won't dry in your screens, making it the industry standard for high-vibe, durable prints. 1. Match Ink to Your Fabric
Plastisol only dries (cures) when it reaches a specific temperature—usually between —throughout the entire ink film. Plastisol Ink Screen Printing Guide - Keygadgets