How to ensure proper curing of uv ink?
author: Uvink
2022-12-28
How to ensure proper curing of uv ink?The curing of the ink film when it first
passes through the curing unit is very important. Proper curing can minimize
the deformation, over curing, re wetting and insufficient curing of the substrate,
and optimize the viscosity between ink and humor or coating and coating. In order
to test the curing efficiency of uv ink, start printing at the lowest speed allowed by
the substrate, and cure the first printed sample. Then, set the curing lamp power
to the value specified by the ink manufacturer. When dealing with colors that are
not easy to cure, such as black and white, we can also appropriately adjust
the parameters of the curing lamp.
How to ensure proper curing of uv ink?After the printing sheet cools down,
we can measure the adhesion of the ink film with the bidirectional hatching method.
If the sample can pass the test successfully, the paper transfer speed can be increased
by 10 feet/minute, and then printing and testing can be carried out until the ink film
loses its adhesion to the substrate, and the conveyor belt speed and curing lamp
parameters at this time can be recorded. Then, according to the characteristics of
the ink system or the recommendations of the ink supplier, the speed of the conveyor
belt can be reduced by 20-30%.
If the color of uv ink does not overlap, should you care about excessive curing? When
the surface of an ink film absorbs too much uv light, excessive curing will occur. If we
can't find a solution to this problem in time, the surface of the ink film will become
harder and harder. Of course, as long as we do not carry out color overprint, we do
not need to pay too much attention to this problem. However, we need to consider
another important factor, that is, the printed film or substrate. uv light can affect most
substrate surfaces and some plastics sensitive to uv light of specific wavelength. This
sensitivity to specific wavelengths, coupled with oxygen in the air, can lead to degradation
of the plastic surface. The molecular bonds on the surface of the substrate may be damaged,
and the adhesion between the uv ink and the substrate may be lost. The degradation of
substrate surface function is a gradual process, and has a direct relationship
with the uv light received.
passes through the curing unit is very important. Proper curing can minimize
the deformation, over curing, re wetting and insufficient curing of the substrate,
and optimize the viscosity between ink and humor or coating and coating. In order
to test the curing efficiency of uv ink, start printing at the lowest speed allowed by
the substrate, and cure the first printed sample. Then, set the curing lamp power
to the value specified by the ink manufacturer. When dealing with colors that are
not easy to cure, such as black and white, we can also appropriately adjust
the parameters of the curing lamp.
How to ensure proper curing of uv ink?After the printing sheet cools down,
we can measure the adhesion of the ink film with the bidirectional hatching method.
If the sample can pass the test successfully, the paper transfer speed can be increased
by 10 feet/minute, and then printing and testing can be carried out until the ink film
loses its adhesion to the substrate, and the conveyor belt speed and curing lamp
parameters at this time can be recorded. Then, according to the characteristics of
the ink system or the recommendations of the ink supplier, the speed of the conveyor
belt can be reduced by 20-30%.
If the color of uv ink does not overlap, should you care about excessive curing? When
the surface of an ink film absorbs too much uv light, excessive curing will occur. If we
can't find a solution to this problem in time, the surface of the ink film will become
harder and harder. Of course, as long as we do not carry out color overprint, we do
not need to pay too much attention to this problem. However, we need to consider
another important factor, that is, the printed film or substrate. uv light can affect most
substrate surfaces and some plastics sensitive to uv light of specific wavelength. This
sensitivity to specific wavelengths, coupled with oxygen in the air, can lead to degradation
of the plastic surface. The molecular bonds on the surface of the substrate may be damaged,
and the adhesion between the uv ink and the substrate may be lost. The degradation of
substrate surface function is a gradual process, and has a direct relationship
with the uv light received.
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