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    热 /超声打印机 - NSL UP-X898MD Sony(日本)

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    Ultrasound printer(或直接热打印)是digital printing通过选择性加热涂层来产生印刷图像的过程thermochromic paper, orthermal paper众所周知,当纸张通过热量时print head。涂层转黑色的in the areas where it is heated, producing an image. Two-colour direct thermal printers can print both black and an additional颜色(oftenred) by applyingheat在两个不同的地方温度rmal transfer printing是一种非常不同的方法,它使用热敏色带代替热敏纸,但使用类似的热打印头。

    A thermal printer comprises these key components:

    • Thermal head: generates heat; prints on paper
    • 板条:馈送纸的橡胶辊
    • Spring: applies pressure to the thermal head, causing it to contact the thermosensitive paper

    In order to print, thermo-sensitive paper is inserted between the thermal head and the platen. The printer sends anelectric currentto theheating elements热头,产生热量。热量激活热敏纸的热敏着色层,在加热的地方会改变颜色。这种印刷机制被称为热系统ordirect system。The heating elements are usually arranged as a line of small closely spaced dots.

    纸张用染料的固态混合物和合适的基质浸渍。结合fluoranleuco dyeand an八烷基膦酸是一个例子。当矩阵在其熔点上方加热时,染料与酸反应,转移到彩色形式,然后在矩阵足够快地固化后,将变化的形式在亚稳态状态下保守(一个称为称为称为的过程thermochromism).

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