Flexographic Inks

Low ink transfer due to anilox cell clogging (poor dispersion or wrong particle size)
Viscosity swings during long runs
Difficulty dispersing high jetness blacks (small particles cause viscosity spikes)
Foaming in water-based systems
Scratches on BOPP/PET films due to grit contamination
Ink drawdown lines → poor print density

Low ink transfer due to anilox cell clogging (poor dispersion or wrong particle size)
Viscosity swings during long runs
Difficulty dispersing high jetness blacks (small particles cause viscosity spikes)
Foaming in water-based systems
Scratches on BOPP/PET films due to grit contamination
Ink drawdown lines → poor print density

Fundamental Requirements From Carbon Black

Medium-to-large particle size → Lower viscosity, smoother flow

Low-to-medium structure → Easy anilox release

Clean dispersion → Prevent streaking

Low grit → Protect expensive anilox and plates

Controlled surface chemistry → wetting in aqueous or solvent systems

What Carbon Black Must Deliver

Controlled undertone for film clarity

Low seeding and no re-agglomeration over time

Fast wetting into NC/PU/PVB resins (solvent-based)

UV-curing response (UV flexo)

Zero foam contribution

Stable fluid rheology for long-run flexo jobs

How ISTAR Series Solve It

EMPIREX®

(Furnace black, medium particle size)

Low viscosity, fast dispersion

DURONIX®

(gas-black inspired)

deeper jetness for premium film packaging

Surface-oxidized variants → stable viscosity + fast wetting

Low grit manufacturing → scratch-free printing on high-value films

TDS

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Products and Applications

Packaging & Publication Inks

Products

Packaging and Publication inks

High-Performance Carbon Blacks for Flexo, Gravure & Offset