Jan. 2007

HARDENER JA-940

APPLICATIONS

• Hardener for 2 pack type of ink.
• To improve the adhesion and properties of evaporative drying type of ink.

CHARACTERISTICS

• JA-940 is the most flexible hardener.
• As JA-940 does not yellow, printed matters can be used for outdoor uses.
• Reactivity of JA-940 is as low as JA-950, which means longer pot life.

HOW TO USE

• Add JA-940 to the ink by 7-20% and stir. (Standard ratio is 15%)
• Add thinner and sir well.

CURING TIME

• 25°C(77°F) : 5-7 days
• 80°C(176°F) : 120 minutes
• 100°C(212°F) : 60 minutes
• 120°C(248°F) : 30 minutes

POT LIFE

25°C(77°F) : 4-8 hours

PRECAUTIONS

1. As the reactivity is low, heat drying is preferable. The higher the drying temperature is, the better the properties become.
2. When fast curing is required, add accelerator JA-E11 by 1-3% to the mixture of ink and JA-940. Curing time shortens to half or to quarter. Pot life also becomes shorter.
3. Conditions for printing must be decided according to the instructions of each ink series. Pre-test is essential.
4. Ink can be used for some time after the pot life. However properties and gloss becomes poorer. Avoid using the mixture after pot life.
5. Hardener becomes solid by humidity even before added to the ink. Close the container tightly after use, and use it up on the same day the container is opened. Shelf life of one year is for the unopened condition.
6. As JA-940 is flexible type, the hardness of the ink film and solvent resistance are not so good.
7. Please refer to MSDS before use.
8. Be sure to do trial print before commercial run to confirm that the product fits the purposes.

TYPE OF PACKING

100-gram-can