General Description

4489 is a single part urethane based heat curing ink for application using an open cup pad printing system. It was designed specifically for printing on materials used in the manufacture of electronic components including low stress and conventional molding compounds, ceramic, anodized aluminum, nickel and gold. This ink is suitable for flash curing on in line IR systems. 4489 does not exhibit offsetting when parts are stacked after IR cure in strip marking applications

Cure Property: heat cure

Thinner: ZO

Cleaner: 320

Remover: 210

Accessory Chemicals:
This product is ready for thinning as received. The addition of thinner is necessary to establish a viscosity appropriate for specific applications. 4-7 seconds using the narrow slot spatula is considered a typical printing viscosity range. Fine detail printing or shallower etch depths (<0.7 mil) require ink on the low end of the viscosity recommendation. Monitor the viscosity in the reservoir every four hours and add thinner as required.

ZO is the thinner of choice for most applications. Other thinners have also worked for this ink. WB thinner may be an alternative in closed cup systems.

Drying / Curing: 4489 has passed MIL STD resistance to solvent testing on low stress molding compounds after IR exposure which raises the surface of the device to 150°C for a duration of 4 -5 seconds. It is important to note that the surface temperature of the component must reach this temperature to prevent printed strips from sticking together when stacked. It is not necessary for the component to reach this temperature, only the printed surface. It is recommended that cure be evaluated on each application due to variations in IR cure units and substrate. Recommended oven curing conditions: 150°C (300°F) for 2 minutes 110°C (230°F) for 10 minutes 95°C (203°F) for 30 minutes 80°C (175°F) for 1 hour

Technical Data: • With any MARKEM ink the surface to be printed must be properly cleaned prior to marking.
• Each application must be evaluated by the customer to determine the maximum pot life for best results.
• Cured prints of inks in this series have shown good resistance to the following conditions after application in accordance with MARKEM's recommended procedures:
> solvents, including those specified in MIL-STD-883 Method 2015 (revision current at the time of testing).
> tape pull
> acidic plating preparation solutions and solder flux/solder dip processes
> resistance to solder dunking at 250° for 15 seconds

Shelf Life: The shelf life for this ink series is six months from the date of shipment or twelve months from the date of manufacture, whichever is less.

Optimum storage condition is at 5-10°C in the original unopened container. Allow ink to warm gradually to room temperature before use. Storage at room temperature will not diminish shelf life.

Important Notes

• The materials used in formulating this product may present health or safety hazards as defined by the OSHA Hazard Communications Standard. Always consult the Material Safety Data Sheet for specific hazard information before using this product.
• No warranty for suitability of chemical products for specific applications is expressed or implied. The performance (transfer, adhesion and permanance) of any ink is directly related to the cleanliness of the surface being printed. The specifications for these chemical products are subject to change without notification or obligation.
• Contact Sales Support, or your local MARKEM representative, for assistance with colors, related inks for other application methods, or any other application questions.

Technical information is subject to change without notice.

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