Screen Printing Inks

Plastisol inks run commercial screen printing in India, and there are good reasons for that. They don't dry in the screen, they give you consistent colour, and they cure predictably with heat. We carry the full range because different substrates and finishes need different formulations. A poly bag printer and a balloon printer have nothing in common except the screen. Their inks shouldn't be the same either.

PVC Ink

PVC resin particles suspended in liquid plasticizer. It stays wet in the screen indefinitely because there's no solvent to evaporate. Only when you apply heat does the resin fuse with the plasticizer into a continuous film. Most Indian screen printers learn on this ink. It's the one you'll use the most.

Where it's used

Cotton and cotton-blend garments, fabric banners, promotional T-shirts, school uniforms. Covers about 80% of textile screen printing jobs in Kerala and across South India.

How to use it right

Print through 43T-77T mesh depending on coverage needed. Cure at 150-165°C. Make sure the entire ink film thickness reaches this temperature, not just the surface. Use a temp gun on the ink surface right after it exits the dryer. If you're getting 155°C readings on top, the bottom is probably 10-15°C cooler.

Watch out for

Under-curing is the single most common problem. At 120°C the print feels dry to touch but it hasn't fused. It'll crack and peel in the first wash. Over-curing scorches the fabric and makes the ink brittle. If you're printing on dark garments, you need a white underbase first or the colour will look washed out.

Storage & handling

Stable for 12-18 months in sealed containers at room temperature. Keep away from heat sources. If the ink gets above 50°C in storage, it can start to partially gel. Stir well before use if it's been sitting for weeks.

Quick Comparison

Ink Type Base Chemistry Cure Method Cure Temp Primary Substrates
PVC Ink PVC resin / plasticizer Heat fusion 150-165°C Cotton, cotton blends
PVC Gloss Ink PVC resin / plasticizer (no blowing agents) Heat fusion 150-165°C Cotton, cotton blends
PVC Fluorescent Ink PVC resin / fluorescent pigments Heat fusion 150-160°C Cotton (over white underbase)
F/C PVC Ink Modified PVC resin Heat fusion (low temp) 127-138°C Polyester, poly blends
F/C PVC Gloss Ink Modified PVC resin (gloss) Heat fusion (low temp) 127-138°C Polyester, poly blends
Poly Bond Ink Modified polyolefin-bonding resin Heat fusion 150-160°C PP woven bags, HDPE bags
Net Bag Matt Ink Polyolefin-bonding resin (matte) Heat fusion 138-155°C HDPE/PP mesh net bags
Balloon Ink Rubber-compatible flexible resin Air dry / low heat Low heat Natural & synthetic latex
Tin Coating Ink Epoxy resin (thermosetting) Oven bake (crosslinks) 150-165°C Tin, aluminium, metal

Common Questions

What's the difference between standard PVC ink and fast cure PVC ink?

Standard PVC ink cures at 150-165°C. Fast cure (F/C) PVC ink fuses at 127-138°C, about 40-50 degrees lower. The lower cure temperature is there to prevent dye migration on polyester fabrics. At 150°C, the disperse dyes in polyester sublimate and bleed into the ink, causing colour contamination that shows up hours or days after printing. If you're printing on cotton, use standard PVC. It gives slightly better adhesion and is more forgiving. If you're on polyester or poly-blend, fast cure is not optional. It's necessary.

Which ink works for printing on polypropylene bags?

Poly Bond Ink. Standard PVC ink won't adhere to polypropylene because PP has very low surface energy, around 29-36 dynes/cm. Ink needs at least 38-40 dynes to wet and grip a surface. Poly Bond uses a modified resin system that achieves adhesion on polyolefins. For PP mesh net bags, use Net Bag Matt Ink instead. Same adhesion chemistry but with a matte finish that holds up better to the handling abuse net bags take in transport.

How do I know if my plastisol ink is properly cured?

Stretch test is the simplest field check. Stretch the printed area firmly. Properly cured plastisol stretches with the fabric and snaps back without cracking. Under-cured ink will crack or split. For a more reliable test, wash the printed garment at 60°C with detergent, tumble dry, and examine. If the print shows cracking, peeling, or significant colour loss, it's under-cured. For production, invest in a temperature probe or donut probe that measures the ink-fabric interface temperature. Surface readings with an IR gun run 10-15°C higher than what the bottom of the ink film actually reaches.

Is this the same ink used in desktop printers?

No. Screen printing ink and desktop printer ink are completely different products. Desktop printers (HP, Canon, Epson) use liquid inkjet dyes or laser toner cartridges. Screen printing ink is a thick paste or plastisol pushed through a mesh stencil onto fabric, paper, plastic, or metal. You can't use one in place of the other. We sell screen printing and offset printing inks only. For computer printer cartridges and refills, you'll need a computer peripherals shop.

We've been stocking screen printing inks since 1990. Every formulation on this page, tested and trusted by printers across Thiruvananthapuram. If you're not sure which ink suits your substrate, walk in or call. We've sorted out ink selection problems for hundreds of printers and we'll get you the right product the first time.

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