What is Discharge Ink?
Technical definition, shop floor implications, and pricing strategies for commercial apparel decorators.
A specialized water-based ink mixed with a zinc formaldehyde sulfoxylate activator agent that chemically removes reactive dyes from 100% cotton fabric and replaces them with pigment for an ultra-soft hand feel.
Deep Dive & Practical Application
When heat is applied to a garment printed with activated discharge ink, the chemical bleaching agent destroys the original shirt dye molecules in the printed area, returning the cotton fiber to its natural off-white color while locking in any added pigments.
Once washed, the print has virtually zero tactile ink deposit (known as "zero hand feel"), creating vintage, breathable, retail-quality prints on high-end fashion apparel.
Discharge printing requires 100% ring-spun cotton fabrics dyed with dischargeable reactive dyes. It will not work on polyester or synthetics, and produces inconsistent results on royal blue, kelly green, and certain purple dyes.
Shop Floor & Profitability Impact
Discharge inks have a pot life of 6 to 12 hours once activated with powdered agent. Any leftover ink must be discarded at the end of the shift, requiring precise batch ink mixing in your shop management software.
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