You had will ink out of the pot directly the behavior of the printing ink? You have had repeated wipe piling up in the act of printing ink screen? Have you ever in blow ink on the knife to inappropriate pressure experience? If you give the three the answer to the question is affirmative, that you had the screen printing process of three taboo. If you can spend a little ink is experienced in mind, and at the same time using repeatable tight screen, scraping ink knife control Angle and speed, can easily avoid screen printing most of the problems encountered in the process.
The above mentioned each problem will directly affect the quality of the prints, production efficiency and printing enterprise prestige. This paper will ink to allocate a detailed discussion.
Almost all of the increase of plastic sol ink factory are concentrate, manufacturer, color and type, the degree of the different concentration is different, some even super concentrated. Here we will focus on the plastic sol printing ink, discussion because most of the textile printing all use the ink. Simply speaking, printing ink by the three main components of: PVC plastic), pigment (color) and plasticizer (or other additives).
1. PVC
PVC is a hot melt adhesive, after the pigments attached to solid in textile material surface. It is a very fine particles of the dispersion of resin, a little like sugar. When it and plasticizer or other types of additives mixed (except pigment outside), become colorless transparent liquid material, coating can be formed after is thin thin film. To mix, you'll find it with YanKe than the ink mixing, and more likely to more easily from ink scraping knife, the viscosity is very different than the pigment, it with more suitable for printing ink, are also more likely to printing.
2. Waste
Generate colour pigments, it was a fine particles of the tiny, and PVC and other additives mixed. It and transparent PVC and other additives mixed ratio determines the colour opaque and transparent properties. Screen printing ink pigment concentrations than four-color printing ink pigment concentration is higher, even for the same type of printing ink, by different manufacturers, pigment percentage also each are not identical, viscosity also is so, so their printing eligibility and colour the concentration is accordingly some difference.
Below we do a simple experiment: a comparison is designed with direct from vessel out of the ink printing high saturation colour, like blue or red. The other is in the same a printing ink to join the same amount of transparent additive substance, stir well to print. You will find that for most types of ink is concerned, the colour of two pieces of printed matter is the same, not big difference. And 50%, 50% transparent additive pigment ink mixture can meet the demand of homework, and make the process more simple and easy to operate, and printing costs and reduced many. Now for another experiment, this time in a primitive the printing ink to join two transparent additives. Then pigment ink accounts for only 33% of the total amount, it can be found that the mixture of printing eligibility and have further improved, and for most of the products it manufacturer, colour is still can accept. In the configuration of the ink, you have to test different manufacturer printing ink, their type and hue, this is because some ink mixed with 50% of the additive change color after weak, but others are not produce any change.
3. Plasticizer
Manufacturers used to allocate ink additives and plasticizer was the cause of the main ink quality difference factors, among which is the most important ingredients, plasticizer most circumstance also called reductant.
In printing ink to add a small amount of the reducing agent, can make the viscosity of the ink, so as to improve reduce ink printing eligibility. Usually in four-color printing is not add reductant and, in the process, the screen printing ink point is the formation of the screen on the Internet by the size of the hole to decide. If the nets hole left their surfaces, can make the ink printing out of shape, point blurred image.
The capsule of like water reducing agent of transparent, if you up a spoon out, will feel it a bit like the oil, use of the time want to strictly abide by the manufacturer of it. If join of the reducing agent too much, so whether you join many desiccant, printing speed is slow, after dryer is how long, printing ink is difficult to and textiles combined. So add in the reducing agent must discreet.
Some company production of the reducing agent for curing, it is reducing agent and PVC and other additives mixed according to the proportion of the mixture, can rise to dry the role of curing. Use a reductant can give printing process, but the actual benefit in production process, people often don't comply with the manufacturer's instructions, abuse, and the number of reducing through vision and feeling to evaluate whether appropriate application. Of course this kind of practice is very harmful.
If use undeserved, the dose of printed images or has a greasy feel, will either have a kind of faded feeling. This kind of circumstance, users often complain about the quality of the products not line, and ignore the ink in configuration when they use the wrong dose of additives.
Sometimes people think that reducing agent and thinner is same, the concept and can lead to another erroneous zone.
Reducing agent and thinner, have very big distinction, of which only reducing agent will reduce the viscosity of the ink, and thinner, will not affect the viscosity of the ink.
If in the printing of the time don't add reductant, and you will find that printing out of print has obvious ink accumulation, can appear even orange phenomenon, printing surface is very uneven, appear a few small pit. And when up the screen, from material printing ink down part. And the same printing, just in the printing ink and addition of suitable amount of reductant, and found that the phenomenon of ink accumulation significantly reduced, silk screen up also won't adhesion when the ink.
Pigment less means is sex small, ink accumulation, and reducing phenomenon less can further improve ink happening. Piles of