UV Led Ink,Anti-Set-Off Spray Powder,EF Plate Cleaner

Powderise of ink	Inadequate use of adhesive material in ink.	Use ink with weaker color density and with faster drying.
	Low tack value of ink.	Use ink with higher tack value.
	Bad absorbing of paper.	Use ink with weaker color density and with faster drying.
	Slow drying of ink.	Add appropriate quantity of drying agent.

7. Offset Ink can use in plastic bag printing?
Recently, we received a special demand from a Libyan customer, who requested offset ink to print on plastic bags. As we all know, plastic bags have a smooth surface and cannot be penetrated and dried. Therefore, flexographic ink is often used. Offset ink is generally used for paper and cardboard. Through the video sent by the customer, we learned that it was a small Indian workshop that their Indian friend sent him to print plastic bags with offset ink. Because offset ink is relatively cheap compared to other inks, it is very likely to be able to print with offset ink in the Indian market.

At the request of the customer, we conducted an experiment in our laboratory using ordinary transparent plastic with our LED UV ink. The result is that the ink can adhere to it, but it is not resistant to friction and will fall off when rubbed by hand. But we know that some bags on the market will have a little permeability, so it is still possible.

Through this customer inquiry and experiment, we feel that there is nothing you can't do, only what you can't think of. We need to learn from the Indian market in this regard.

*Problem*	Possible Cause	Solution
Mottling	Too much water supply,excessive emulsification of ink.	Reduce water supply. Adjust water / ink balance.
	The former set of rolling cylinde has excessive water supply leading to paper transfer with excessive water.	Reduce water supply of former set of roller cylinder.
	Paper not strong or coating too weak.	Use suitable quantity of tack reducing agent to decrease tack of ink.
	Blamket rolling cylinder has too much pressure on paper.	Reduce printing pressure to machine supplier's specification.
	Blanket too hard.	Change to blanket with softer nature.
	Too high color density of ink leading to inadequate supply of ink being transferred to plate.	Add ink reducer to reduce color density of ink.

Problem	Possible Cause	Solution
Set-off	Inadequate spray powder	Use more spray powder and use larger particle of spray powder
	Paper stack too high at paper receiving end	Avoid paper stacking too high
	Ink supply increased due to weak colordensity of ink	Use ink with higher color density to avoid the need toincrease ink supply

Problem	Possible Cause	Solution
Ink Caking	Short ink thread and lack of flow	Add good quality of ink reducer to increase the flow
Ink Caking	Ink has thixotropy feature , must stir to avoidbecome solid	Stir often so that ink stays flowing

Problem	Possible Cause	Solution
Bad rub-resistance	Obvious rub during paper transfer	Check the paper transfer mechanic to rule out the cause of being rubbed
	Ink powderised and not adhere to paper	The pigment and linking material are not ratiolly matched for paper in printing
	Coarse surface of paper	Consider applying o.p. vamish after printing

Slow-Drying	Possible Cause	Solution
	Inadequate content of drying agent in ink	Add appropriate quantity of drying agent to ink
	Overuse of anti-oxidiser in ink	Add drying agent and use good property of linking material
	Too strong alkaline property of paper	Check the paper dryness before printing
	Paper too wet	Use hot air to dry paper or place paper in a dry place.Good ventilation is helpful to quicker dry of ink
	Too acidity of fountain solution	Modify the PH value of fountain solution to value above 4
	Loss of activity of drying agent in ink	Add drying agent to ink

FAQ