FAQs

General Questions

The ability to fulfil a rush order is reviewed on a case-by-case basis. The decision depends on work load and product availability at any given time. We try to accommodate rush order requests whenever possible. To initiate a rush order, contact your Unistar Inks sales or customer support representative. If this is a first-time order, simply call the Unistar Inks location nearest you and a representative will help you.

Customers are always welcome to prepay orders or work on a cash basis. However, Unistar Inks also works with many customers on credit. A credit application must be submitted before Unistar Inks completes any work on a customer's first order. For a complete copy of our Credit Policy or to initiate a credit application, contact a Unistar Inks sales representative or customer support representative at the location nearest you.



Water Based Questions

Plastic film water-based ink in the printing process in the production of static electricity in the inevitable, printed static electricity may cause serious printing failure: the line part of the wire around the filamentous; field part was mottled; ink transfer is not on; produce a blank part; Cause sparks or fires and so on.

Water-based ink in the printing process of material friction or contact with other objects, stripping when the static electricity. Paper and plastic film is a bad conductor, through the printing press itself with static electricity.

1. In the printing process to improve air humidity, can reduce the probability of static electricity.
2. After printing, make the film in contact with the static electricity.
3. Printing guide roller to do in addition to static treatment.
4. Improve the printing viscosity of water-based ink.



Solvent Based Questions

1. CAUSE There is too much retarder in the ink. REMEDY Replace the ink.
2. CAUSE The film temperature at the winder is too high. REMEDY Reduce the temperature of the tunnel dryer and check whether the cooling drum is working
3. CAUSE The pretreatment level of the film is too low. REMEDY Check the pretreatment and the age of the film. Use the inline corona treatment.

1. CAUSE The ink dries on the anilox rollers. REMEDY Clean the anilox roller. The printing pressure is too high or too low between the plate cylinder and the substrate or between the anilox roller and printing plate.
2. CAUSE The ink is too thin. REMEDY Increase the viscosity with fresh ink.
3. CAUSE The anilox roller is worn. REMEDY Replace the anilox roller.



UV Inks Questions

Scarce polymerization Check the real power emitted by the lamps, if necessary switch on another lamp or decrease the carpet speed.
Too much ink deposit Check that the quantity of the ink deposit is proportional to the energy emitted by the UV lamps. Alternatively, increase the number of th/cm according to the desired effect.
Printing substrate Check the chemical nature of the printing substrate and select the most suitable ink. Check also if the substrate has a printing side.
Surface treatment of the printing substrate With certain kind of substrates it is necessary to make a surface treatment before printing. Check the treatment effectiveness or eventually do it once again.

Low power lamps Check the real power of the lamp by using a radiometer.
Too much ink deposit Check that the quantity of the ink deposit is proportional to the energy emitted by the UV lamps.

Concentration of the black pigment All conditions being equal, a black ink has a polymerization speed which is halved compared to a yellow one. This is due to the absorption of the light by the black pigment. For this reason, it is necessary to increase the lamp power.
Colour of the printing substrate Light colours reflect the radiant energy making the ink film more reactive, while the dark or transparent substrates tend to absorb more energy. It is therefore necessary to compensate the greater absorption whit a more powerful UV lamp.



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