How to ensure the curing quality of uv ink?

author: Uvink

2022-12-07

How to ensure the curing quality of uv ink?Do a good job of ink balance control.

In the offset printing process, the uv ink shows weak polarity. If the ink balance control

is not good, it is very easy to emulsify, causing the ink film to become opaque, which

directly affects the transmittance of uv light, thus slowing down the curing speed of uv ink,

causing the ink film to remain incomplete curing after its formation. In this case, if the

printed matter is tortured and rubbed or the tape is used to pull its surface image and text,

the printed matter surface will be scratched or brushed. Therefore, it is one of the important

factors to control the ink balance in the printing process to ensure the curing quality of uv ink.

How to ensure the curing quality of uv ink?Keep the workshop temperature and humidity

appropriate. During the printing process, the change of workshop temperature and humidity

will affect the performance of uv ink and substrate. For example, when the workshop temperature

is low and the humidity is high, the uv ink has a slow photocuring reaction, and its binding

ability with the substrate will also be reduced. Therefore, when printing with uv ink, the temperature

and humidity of the workshop must be controlled within an appropriate range. Generally,

the workshop temperature should be controlled at 20~25 and the relative humidity

should be controlled at 50%~65%.

How to ensure the curing quality of uv ink?It is an important prerequisite to ensure the uv light

intensity of the uv lamp, and select and install the uv lamp with appropriate power according to

the printing speed and product type. The uv light intensity of the uv lamp directly affects the curing

time of the uv ink, which is also a key factor affecting the internal hardenability of the ink film.

When the uv light intensity becomes low, even if the accumulated light amount is increased by

increasing the irradiation time, the hardenability inside the ink film cannot be improved,

so the uv lamp tube that exceeds the actual service life cannot completely cure the uv ink.