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High-Performance Solvent Ink

Time Maximized
Waste Minimized

  • 12-Hour
    Decap Time
  • 24-Month
    Shelf Life
  • Endless

Talk to SIGMA Experts

Ink in an hourglass
Go to SIGMA details

A heatless inkjet ink, SIGMA solvent ink for HP 45si Specialty Printing Systems cures fast with deeper blacks and high durability, offering an industry-leading 24-month shelf life with 12-hour decap.

12-hour decap improves efficiency

We measure SIGMA decap in hours, not minutes. SIGMA is the HP 45si solution for OEMs and industrial inkjet printers for maximum latency.

  • Significantly reduce maintenance costs
  • Less wasted materials
  • Reduced nozzle failure
  • Improved trajectory, volume, and velocity

24-month shelf life reduces ink waste

Count on quality and performance from SIGMA’s extended shelf life. Ink management just got easier–and less costly.

  • Reduce disposal costs
  • Reduce ink costs
  • Improve control of ink inventory

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Fast-drying, heatless inkjet printing

No need for external heat sources or dryers, because SIGMA cures quickly on non-porous substrates.

  • Less power consumption saves money
  • Improved running times
  • Reduced equipment and maintenance costs


Coming Soon
Faster properties times and improved dot gain

More substrates for TIJ printing systems

SIGMA is uniquely engineered to support HP Speciality Printing Systems for TIJ coding, marking, and mailing production, delivering richer blacks with high durability on more difficult, non-porous substrates:

  • Plastics – Nylon, OPP, PET, PVC
  • Metals
  • Packaging – Glossy and UV laminated papers
  • Other non-porous substrate


“Our customers are very happy to use SIGMA because of the long decap time. Until SIGMA , that has been a weak point for TIJ ink.”

Don Inyoung

PT Asia Ltd.

Interested in SIGMA?

No minimum order quantity and quick turnaround time. Reach out to our expert team and we’ll be happy to help you.

Talk to SIGMA Experts

Comparing Solvent Inks for HP 45 SI Systems

Kao Collins Sigma General IQ 800 SoluJET HP2590
Decap 12 hours 1 hour 1 hour 24 hours
Shelf Life 24 months 9 months 6 months 9 months
Dry Time 3 - 5 seconds 2 - 4 seconds 1 - 3 seconds 2 - 4 seconds
Operating Conditions 10°C - 40°C 15°C - 35°C 15°C - 35°C 15°C - 35°C

SIGMA helps you reach sustainability goals

No need for external heat sources or dryers, because SIGMA cures quickly on non-porous substrates.

  • Lowers environmental impact by producing less waste
  • Reduces transportation costs, thanks to ink conservation
  • Lowers energy consumption through heatless curing
  • Offers a cost-effective alternative to continuous inkjet printers (CIJ)

Ink Responsibly.


Shelf life

Q. What is the shelf life of SIGMA ink?

A. The shelf-life stability of our individual SIGMA ink cartridges lasts 24 months, more than double that of other ink manufacturers.


Q. What is the decap time of SIGMA ink?

A. SIGMA solvent ink has a decap of 12 hours, much longer than other solvent inks on the market.


Q. What is the colorant of SIGMA ink?

A. The ink is a dye solution engineered to deliver richer blacks than other inks on the market.


Q. Does SIGMA use heat for curing

A. No. The ink dries fast without external curing sources to produce a durable, resistant result.


Q. What is the minimum order quantity for SIGMA ink?

A. Unlike other ink manufacturers, Kao Collins does not require a minimum order quantity (MOQ) for SIGMA ink.

SIGMA Solvent Specs


SIGMA TSK318203 - HP 45si Technology

Fast Dry
Excellent Decap

SIGMA is a solvent-based ink formulated to dry quickly on difficult media such as plastic films (PE, PET, PP), PVC, UV coats, and some metals, with extended open times (decap).

Contact Kao Collins for SDS for this product

Ink features

Recommended printer settings

  • Fluid base: Solvent
  • Colorant: Dye
  • Flash point: < 16°C
  • Shipping info: UN1210 Class 3 Flammable
  • Pen driver voltage: 8.4 V
  • Fire pulse length: 1.8μs
  • Pulse warming: off

Cartridge maintenance & handling

Cartridge storage

  • Use a dry lint-free cloth to clean the print head
  • With nozzles facing down, wipe slowly and lightly across tip of the long edge
  • Forcing the wipe (too much pressure) may scratch the print head
  • Use of a cloth with lint may clog the nozzles
  • Storage conditions: 10°–30°C
  • Operating conditions: 10°–40°C
  • <1 day down: leave cartridges in the machine and wipe/purge before use
  • >1 day down: remove cartridges from machine and place cartridge clip over the head, wipe and purge before use
  • Decap time: 12 hours
  • Shelf-life (single-CT): 24 months

Need something else?

Reach out today and let us know how our friendly, knowledgeable team can help.