Some cloth books use sublimation printing technology. The dyes used in printing are pigments extracted from plant flowers, stems, leaves, and roots of colored plants. They are formulated through a special process. When printing, the dyes are printed on a special whole. On wood pulp paper, the dye is vaporized by a special machine at a high temperature of 200 ℃ and transferred to the fiber of the printed fabric for a second time. After printing, the dye is completely combined with the fabric, and the dye content of the printed matter is extremely low, but The printing effect is excellent, and there is no fading or fading phenomenon.
In order to exercise the baby’s sense of smell, some real objects such as flowers and fruits are printed with perfume inks, using two processes of silk screen and offset printing to achieve fragrance printing. The entire printing process is: the color and graphics on the screen must be associative with the fragrance. After printing the base map with offset, screen printing and spice inks are used to print the fragrance parts of flowers or food, usually always It is printed in two steps. The reason for using screen printing to print is to avoid damage to the capsules in perfume inks. At the same time, because the thickness of the screen printing ink film is about 20 times higher than that of offset printing, it is convenient for long-term retention of fragrance. However, special designs have also been developed recently. Special ink for offset printing. For example, you can use a general offset printing machine, that is, a five-color machine or a six-color machine to print out the base map and the scented ink part at one time with C M Y K and other colors. At this time, pay special attention not to damage the capsules in the fragrance ink.