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In order to clarify the water change Printing Principle, we must first understand the relationship between fabric and water. 1, water exists in the form of fabric Structure because the fabric fibers themselves, with different chemical composition, which varied with the force of water molecules, therefore their absorption rate and water absorption are very different, no matter how much these differences, they absorb water can be divided into three part, that is, bound water, intermediate water and free water. Combination of water and fiber bonding of water molecules, which rely on hydrogen bonding or intermolecular forces in close connection with the fiber molecules. This part of the amount of bound water molecules and the fiber structure, chemical composition is closely related molecules, such as polyamide fibers combined with an amino a water molecule. This part of the water molecules combine with heat to enter the stable state. They can not freezing crystallization will not evaporate at boiling point gasification, this part of the close combination of water and fiber, so when the fabric is only adsorption with water, then people will not feel the fabric are wet. Intermediate water is due to the existence and integration of hydrogen bonds between water molecules were adsorbed on the combination of water outside the water, they are also different common water molecules, their freezing point and boiling point lower than 0 , respectively, and higher than 100 , therefore, the middle of the presence of water will give people a sense of cool. The middle of the water outside the water as free water, because of its very weak interaction between the fabric, so called free water. It thermodynamics with ordinary water have the same phase transition point, when the fiber or fabric encountered free water, due to large amount of water, most of the free form of water is adsorbed, the free water usually exists in the gap between the fibers or fiber in its own hole. It was found to: be water soaked and not soaked in water (still dry fabric), color of the light reflection inconsistent, flooding of a darker color produced with dry fabric color. If you use this color for printing patterns, you can reach the hidden color Printing Effect. 2, by what means to achieve color theory Fabric with water from the above analysis of the starting mechanism, the people think as long as a Textile The surface of fabric products will also be created with two hydrophilic and hydrophobic parts of the color pattern will appear. Therefore, people first think of the traditional dyeing and finishing processes in the water-proof finish, waterproof fabric finishing is the treatment of the whole piece, if the use of printing methods to change the partial order waterproof waterproof finishing printing. Tradition Printing paste material Must be mixed with various dyes to change color paste without any dye printing white pulp (must add a waterproofing agent) printing process. In this calico fabric surface will be the existence of two characteristics: when the fabric after contact with water, not part of the wetting rate faster printing, while printing some have refused because there will not be wetting agent or wetting rate very slow, eventually leading to the same piece of cloth in the great difference between the surface water content, which led to parts of hydrophilic and hydrophobic parts of the color of the color of the reflected light is inconsistent, but a different color gloss, the color of some hydrophilic hydrophobic parts of the color depth than many, due to the emergence of the color pattern is displayed, so that to achieve the effect of implicit color printing. "Zhen Xing Cup" 2009 China Top Ten selection screen printing special awards ceremony More exciting, please see>> The e-commerce company in China offers quality products such as China optical fiber adaptor , fiber optic coupler, and more. For more , please visit fiber optic media converter today!
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