IronBlock LC Grey Blocker Underbase – 270°F Low Cure – Dye Migration Control

IronBlock LC Grey Blocker Underbase is our extreme low-cure grey blocker — the same dye-migration blocking power at a cool 270°F cure, for the most heat-sensitive polyester and sublimated garments. Print it first to stop dye from ghosting up into your colors. CPSIA-compliant and phthalate-free, made in Hackensack, New Jersey.

Pint, quart, gallon and 5 gallon. Heat cure. Made in the USA.

Also available in larger quantities — 30-gallon and 55-gallon drums; call 877-937-6400 for volume and discount pricing.

Features & benefits

• Extreme low-cure grey blocker — full dye-migration blocking at just 270°F
• Protects heat-sensitive garments — poly and sublimated blanks that scorch at standard cure
• Underbase-grade — print first, then colors and white on top
• For polyester, poly blends & tri-blends
• CPSIA-compliant & phthalate-free — made in the USA

Always run a test print first. Before any production run, print and fully cure a test on your exact garment and check opacity, hand and wash-fastness. It's the best habit in the shop — if you're not sure on settings, call us at 877-937-6400 before you run the job.

What it prints on

• 100% polyester & poly blends — print the low-cure blocker first to stop dye migration
• Sublimated & heat-sensitive garments — 270°F cure protects the blank while blocking bleed

Printing & curing

• Mesh: 110–160 for a solid blocking layer
• Squeegee: 65, 75 or 80 durometer — or a 70/90/70 triple durometer
• Flash: 240–260°F between colors
• Cure: curing is a time-and-temperature process — bring the full ink film to 270°F (132°C) — a true low cure; the low cure protects the most heat-sensitive poly; confirm with a temp gun or donut probe, not dryer air temp

Recommended companion products

• Nylon Bond 289 Additive — mix into this ink to bond prints to nylon and other slick synthetics (catalyst; stir in a small amount, limited pot life, always test first).
• Quick Flash Reducer — thins for easier printing.
• Soft Hand Base — softer hand feel.
• UMX® Custom Color Match — send us your target color reference and we custom-mix the color for you (plastisol, solvent, UV & water-base).
• Cleanup: OPTI Wash 125 and OPTI Spot 303.

Safety, PPE & storage

• Wear nitrile gloves and safety glasses; avoid prolonged skin contact with uncured ink.
• Print with adequate ventilation; vent your dryer.
• Always stir before use.
• Storage & shelf life: keep sealed, out of sun. Shelf life 1–2 years. As an all-polyester low-cure ink, store at 60–80°F. In high heat expect container expansion — open carefully. Do not freeze.
• Refer to the Safety Data Sheet before use.

Compliance

CPSIA compliant (16 CFR 1303 <90 ppm; CPSIA §101 <100 ppm total lead) — safe for children's apparel. Phthalate-free.

⚠ WARNING (California Proposition 65): This product can expose you to chemicals known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.

Questions?

Total Ink Solutions
200 South Newman Street, Unit 4 & 5
Hackensack, NJ 07601
Phone:877-937-6400 · Fax: 201-487-9620
Email: sales@totalinksolutions.com