Four basic ways of printing
Date:2015-05-27 00:00 Source:http://www.cainir.com Click:
The basic way of printing, Silicone Printing: including silicone coating printing, discharge printing, resist printing, direct printing.
One, pigment printing
The use of paint instead of dye to produce printed cloth has been so extensive that it began as an independent means of printing. Paint printing is a direct printing, the process is usually called dry printing, in order to distinguish between wet printing (or dye printing).
By comparing the difference of the hardness of the same piece of fabric on the printing and non printing parts, it can be distinguished from pigment printing and dye printing. Paint printing area is slightly harder than the non printed area, perhaps a little more thick. If the fabric is printed with a dye, there is no obvious difference in the hardness between the printed and the non printed parts.
Dark or light than light colored paint printing, is likely to feel more hard, lack of flexibility. When examining a piece of fabric that is present in the paint, it is time to make sure that all the colors are examined, because the same piece of fabric may contain both dyes and paints. White paint is also used for printing, this factor should not be ignored.
Pigment printing is the most inexpensive printing in the production of printing, because the printing is relatively simple, the required process is at least, usually do not need to steam and water. Paint has bright, rich color, can be used for all textile fibers. Their light fastness and resistance to dry cleaning fastness is good, or even be called good, so it is widely used in decorative fabric, curtain fabric and need dry cleaning of clothing fabric. In addition, paint hardly in different batches of woven material produced larger color difference and the cover printing coverage on the background is also very good.
With continuous washing or dry cleaning, paint printing will gradually fade, color is becoming more and more light. This is due to the constant rotation and stirring in the cleaning process to gradually drop off the resin adhesive. After the 20-30 cleaning, the printing fabric will appear obvious phenomenon. The color fastness is improved due to the use of resin and silicone softening agent in the finishing process. It is worth noting that more than light or dark faded light.
Paint to make fabric printing parts feel hard, light colored, this situation is not obvious, but it is very prominent. The paint is not particularly resistant to wear, especially in the dark. Dark paint should be particularly avoided in such as furniture decorative fabrics.
Two, discharge printing
Discharge printing is carried out in two steps, the first step, the fabric was dyed monochrome, second step, the pattern on the fabric.
The second step in the printing paste containing can destroy the background color of the dye a strong bleach, so in this way can production blue bottom white dot patterns of cloth, this process is called daybreak. When the bleaching agent and not with its reaction mixed dye in the same color (vat dyes are of this type), can pull color printing. Therefore, when a suitable yellow dye (such as vat dyes) and color bleach mixed together, you can weave material printed yellow polka dots at the bottom of the blue.
Because discharge printing of the background is first to use the piece dyeing dyeing method, if the same background color is printed up all over the floor of the printing than, the color of the background to rich and deep. This is the main purpose of the discharge printing.
Discharge printing fabric by roller printing and screen printing printed, but not through the heat transfer printing printing. As compared with direct printing, the production cost of printing fabric is very high, it is necessary to be very careful and accurate control of the required reducing agent.
Use this way of printing fabric, sales better, higher prices. Sometimes, in this process, the use of reducing agent will cause damage or destruction of printed fabric.
If the fabric color two sides of the same color (for piece dyeing), and pattern is white or color and the color is not the same, will be able to confirm the discharge printing fabrics; opposite of a careful examination of the pattern, revealed traces of the original background appear this kind of phenomenon is destruction of dye chemicals do not fully penetrate into the fabric of negative).
Three, anti dye printing
Anti dye printing includes two stages:
(1) chemical or wax like resin which can prevent or prevent the dye penetration into the fabric on the white fabric;
(2) piece fabric. The aim is to bring out the color dyeing white pattern. Pay attention to the results and discharge printing fabric, yet this result is opposite with the discharge printing.
Application of anti printing method is not universal, will use the general situation in the background can not discharge. The majority of the anti - dye printing is achieved by means of a manual or manual printing (such as wax printing).
Because the discharge printing and resist printing produced the same printing effect, so often fail to identify by the naked eye.
Four, direct printing
Direct printing is a direct printing on a white fabric or in a dyed fabric. The latter is called cover seal. Of course, prints color than dye background much deeper. A large number of common printing is direct printing.
If the fabric background to white or mostly white and prints from the back seems to be shallower than the front color. Then we can determine the direct printing fabric (Note: due to printing paste penetration of very strong, so when the light of the fabric to the judge).
If the fabric background is negative shades of the same (because it is piece dyeing), and prints than the ground color deep, then this is the cover printed fabrics.
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