Pigment-based inks-At first glance, pigment-based inks seem to be the best choice for textile printing. Their color can be kept bright for a long time and can be used on any kind of fabric. Ink curing is also very simple, only heat or UV curing is required. However, pigment-based inks must be added with resins so that the pigments can be firmly attached to fabric fibers. The increase in resin composition limits the amount of pigments used in inks. Therefore, if the pigment content is high in the pigment ink, the resin content is small, thereby reducing the wash fastness of the ink. The role of the resin is to fix the pigment on the fabric. If the amount of resin is increased, the content of the pigment in the ink will be less, and the ink will have good washing fastness.
Now, there are four kinds of dyes on the market for digital printing, each ink has its own characteristics, suitable for printing on certain types of fabrics, they are:
Reactive fiber inks-cotton thread, linen, silk, man-made fibers and other plant fibers including jute and hemp can be used for reactive fiber ink printing. The ink is bright in color and has good weather resistance. It is suitable for printing clothing and home accessories. Because this ink reacts with textiles and becomes a part of textiles, it is not easy to be washed out, and it has strong fastness to washing. Before reactive fiber ink is used for fabric printing, the fabric needs to be pre-treated. Today, there are many sources of textiles available on the market. Once printed, textiles must be pre-treated and washed.
Acid inks-Nylon, silk, cashmere and leather products can be printed with acid inks. Compared with reactive fiber inks, acid inks are brighter in color and have better firmness, and are more suitable for outdoor logo printing. Acid ink can also chemically react with textiles, so it is not easy to be washed away and has good fastness to washing. Compared with reactive inks, before using acidic inks, textiles must be pre-treated with certain materials. The printed fabrics need to be subjected to high-temperature setting and cleaning, except for leather materials.
Dispersed inks-In most cases, dispersed inks cannot be used for printing on polyester materials. Dispersed inks are bright in color, but not as bright as acid inks and reactive fiber inks, which will become gaseous at high temperatures. Once the ink becomes gaseous, it will gather inside the polyester textile and become a part of the fabric itself, so the dispersion ink has good wash resistance. There are two types of dispersion inks: low-energy inks or "dye sublimation inks" and high-energy inks. Low-energy inks or "dye sublimation inks" provide good light and wash resistance. They can be printed on paper and then sublimated and transferred to polyester materials, or printed directly on textiles and then transferred in an oven. . High-energy disperse dyes have very good light resistance and excellent weather resistance in sunlight. It is very suitable for outdoor furniture decoration printing and automobile decoration. High-energy disperse dyes can be printed directly on textiles and then dried and cured in an oven. They cannot be printed on paper and then transferred to polyester fabrics. Nowadays, dye sublimation printing is very popular, so in textile printing, the most widely used is digital printing on polyester materials.
Pigment-based inks-At first glance, pigment-based inks seem to be the best choice for textile printing. Their color can be kept bright for a long time and can be used on any kind of fabric. Ink curing is also very simple, only heat or UV curing is required. However, pigment-based inks must be added with resins so that the pigments can be firmly attached to fabric fibers. The increase in resin composition limits the amount of pigments used in inks. Therefore, if the pigment content is high in the pigment ink, the resin content is small, thereby reducing the wash fastness of the ink. The role of the resin is to fix the pigment on the fabric. If the amount of resin is increased, the content of the pigment in the ink will be less, and the ink will have good washing fastness.
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