Have you ever remove the ink can proceed directly to printing ink behavior?Have you ever had and wiped the move accumulation on the silk screen printing ink?Do you have on the scraping blade to experience inappropriate pressure?If you give the answer to these three questions is yes, then you can make the three big taboo in the screen printing process.
Almost all the increase plastisol ink factory are concentrate, manufacturer, colors and types, the degree of enrichment is different also, some even super concentrated.Here we will focus on discuss raising plastisol ink, because most of the textile printing using this kind of ink.Simply speaking, the ink is composed of three main components: PVC (polyvinyl chloride (PVC) plastic), pigment (color) and plasticizer (or other additives).
1. PVC
PVC is a kind of adhesive, hot melt after make solid paint adhesion on the surface of textile materials.It is a kind of very fine particles dispersion resins, a bit like sugar.When it mixes with plasticizers or other types of additives (except paint), to colorless transparent liquid substances, after coating can form a thin a thin film.To stir it, you will find it easier than with YanKe ink mixing, and easier to from scraping blade, viscosity is very different, it is suitable for printing more than with pigment ink, and printing more easily.
2. The waste
Color pigments, after it is ground into a fine particles, and mixed PVC and other additives.The proportion of it is mixed with transparent PVC and other additives determines the color of transparent and opaque nature.Silk screen printing ink pigment concentration higher than four color printing ink pigment concentration, even for the same type of ink, produced by different manufacturers, pigment percentage also each are not identical, viscosity, so their printing eligibility and color concentration also has a certain difference accordingly.
Let's do a simple experiment to compare: a printing quality is directly from the container take out the ink printing high color saturation, such as blue or red.Another is in the same ink add to add the same amount of transparent material, stir well to print.You will find that for most types of ink, two print colour is the same, there is no big difference.While 50% pigment inks, a mixture of 50% transparent additives can completely meet the needs of operation, and make the printing process is more simple, the cost is also reduced a lot.Now again, this time in a two transparent additives added to the original ink.Accounts for only 33% of the total, then pigment ink can be found that the mixture of printing eligibility and the further improvements, and for most manufacturers of products, the color is still acceptable.At the time of configuration of ink, ink, you need to test different manufacturers their type and color, this is because some ink after mixed with 50% of the additive color will become weak, and some without any change.
3. The plasticizer
Manufacturer of additives used to allocate printing inks and plasticizer is the most important factor of quality difference ink, plasticizer is one of the most important ingredients, also known as reducing agent in many cases.
Add a small amount of reducing agent in printing ink, can reduce the viscosity of the ink, in order to improve the printing ink printing eligibility.Usually in four-color printing is without reducing agent, in silk screen printing process, the formation of the ink point is determined by the size of the screen hole online.If the mesh leave the surface of substrates, would make the ink dot deformation, printed image blur.
Reductant in the container as crystal clear as water, if you have scooped up a spoonful of, will feel it's a bit like oil, used to strictly comply with the manufacturer's instructions.If join the reductant of too much, no matter how much you add desiccant, printing how slow, after how long does the dryer, it is very difficult for printing ink and textile.So you should be careful when adding reducing agent.
Some reductant is can be cured, it is a reducing agent and the mixture of PVC and other additives mixed in proportion, can have the effect of drying curing.Consume reducing agent can bring benefits to the printing process, but in the actual production process, people often don't follow the manufacturer's instructions, misuse of the amount of reducing agent, and through the look and feel to evaluate whether the appropriate application.Of course this kind of practice is very harmful.
If use improper dosage, or printed image has a greasy feeling, or there will be a feeling faded.In this case, the users tend to complain about the quality of the products, and ignored the they used the wrong dose in the configuration of ink additives.
Sometimes the reducing agent and diluent is believed to be the same, this concept will lead to another myth.
Reducing agent and diluent have very big difference, only reducing agent will reduce the ink viscosity, and thinner, is will not affect the viscosity of the ink.
If at the time of printing without reducing agent, you will find that the printed ink printing quality has obvious accumulation, can appear even orange peel phenomenon, print surface is very uneven, appear a few small pit.And when the lift the screen, will be taken down part of the ink from the substrate.And the same printing, just add the right amount of reducing agent in printing ink, found that the phenomenon of ink significantly reduced, screen when the lift is not ink adhesion.
Pigment less means is small, less ink phenomenon, and reducing agent can further improve the ink.