During the printing process, medium-wave and short-wave heating lamps can work together in the following ways:
Sequential coordination
– Usually short-wave heating lamps are used first. Because short-wave heating lamps can heat up quickly, the solvent in the printing ink evaporates in a large amount in a short time, and the ink is initially dried. For example, in a clothing printing workshop, for a newly printed pattern, a short-wave heating lamp is used for quick treatment first, which can quickly fix the pattern outline and prevent the ink from flowing.
– Then use the medium-wave heating lamp. The uniform heating characteristics of the medium-wave heating lamp can make the ink more evenly heated on the basis of preliminary drying, ensuring the drying and curing quality of the entire printed pattern. For example, in some large-area printing or printing products with high requirements for color uniformity, the subsequent treatment of the medium-wave heating lamp can avoid local color differences.
According to the characteristics of printing materials and inks
– For thick layers of printing ink or printing materials with a tight texture, increase the intensity and time of the use of short-wave heating lamps. Because short-wave infrared rays have strong penetrating power, they can better handle the volatilization of solvents inside the ink. The medium-wave heating lamp plays an auxiliary role in balancing the temperature in this process to prevent the surface temperature from being too high.
– For printing materials or inks that are sensitive to temperature, such as some fabrics containing heat-sensitive fibers or special inks that are easy to change color, medium-wave heating lamps are mainly used for gentle heating. At the same time, short-wave heating lamps can quickly fix the ink base at a low power in a very short time at key nodes, such as when the ink is just attached, and then the medium-wave heating lamps can continue to work to ensure the gentleness and effectiveness of the drying process.
According to the printing pattern and area
– In the case where the printing pattern has fine lines and large areas of color blocks, short-wave heating lamps are used to quickly dry the ink in the line part to prevent the lines from diffusing and blurring. Then, medium-wave heating lamps are used to process large areas of color blocks to ensure the color uniformity and drying quality of the color blocks.
– For large-area printing, medium-wave heating lamps are used as the main heating tool to ensure uniform heating of the entire area. Short-wave heating lamps can be used to supplement heating at the edges or areas prone to uneven drying to enhance the drying effect.
