印花彩板是指通过转印或覆膜技术等手段将各类花纹印刷在镀锌板、镀铝锌等基板上的一种彩涂板。应用较广的主要有大理石纹、迷彩、木纹等印花彩板，其色彩鲜亮、花色繁多。广泛应用于家电、家具、门窗、室内外装饰等领域。
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用细度来判定彩涂板涂料性能指标
细度是测定彩涂板涂料内颜料、体质颜料等颗粒的大小和分散的均匀程度，单位以微米匀，对外观和装饰性能均起到美化作用，且有良好的力学性能等。(pm)表示。彩涂板卷材涂料的背面漆和面漆对细度的要求均很高，一般控制在15~25pm，而底漆的细度则可以粗一些，一般控制在20-40pm。通常来说，细度小，能使涂层平整均细度的测定主要采用量程为50um 的刮板细度计(见图 4-2)，检验方法及标准等效采用几种规格。另配有一把刮刀。双刃均磨光。用国标GB1724-89(79)彩涂板涂料细度测定法。刮板细度计的构造为一磨光的平板，由工具合金钢制成。板上有一沟槽，在槽边有刻度线，分为0-50pm、0-100pm、0-150m等
测量时需要注意以下几点:
(1)根据不同涂料类型选用不同量程范围的细度计，可先用范围大的细度计粗测。(2)在测板上端滴人涂料样品1~2g左右，不要过多或过少。
(3双手握住刮刀，使刮刀与磨光平板表面垂直接触，以适宜的度由沟槽的深部向浅部拉过(一般用 3s时间)，使试样充满沟槽而平板上不留余料。
(4)在阳光下迅速读数(不应超过 5)，使视线与沟槽表面成 15*-30°角，以出现三个以上颗粒均匀显露处读数为准。
Fineness is to measure the size and dispersion uniformity ofpigment and physical pigment particles in coatings. The unit ismicron, which beautifies the appearance and decoration performance,and has good mechanical properties. (PM) denotes. The fineness ofthe back and top coats of coil coatings is very high, generallycontrolled at 15 ~ 25pm, while the fineness of the primer can becoarser, generally controlled at 20-40pm. Generally speaking, smallfineness can make the coating smooth and uniform
The measurement of fineness mainly adopts the scraper finenessmeter with a measuring range of 50um (see Fig. 4-2), and theinspection method and standard are adopted
Several specifications. The other is equipped with a scraper. Bothblades are polished. The national standard GB 1724-89 (79) was usedto determine the fineness of coatings. The structure of the scraperfineness meter is a polished flat plate made of tool alloy steel.There is a groove on the plate and a scale mark on the edge of thegroove, which is divided into 0-50pm, 0-100pm, 0-150m, etc
The following points should be noted during measurement:
(1) The fineness meter with different measuring range can beselected according to different coating types, and the finenessmeter with large measuring range can be used for rough measurementfirst. (2) Drop about 1 ~ 2G coating sample on the upper end of thetest plate, not too much or too little.
(3) hold the scraper with both hands, make the scraper contact withthe surface of the polished plate vertically, and pull it from thedeep part of the groove to the shallow part at an appropriatedegree (generally takes 3S), so that the sample is filled with thegroove and no residual material is left on the plate.
(4) Read quickly in the sunlight (no more than 5), so that the lineof sight is at an angle of 15 * - 30 ° with the groove surface, andthe reading at the place where more than three particles are evenlyexposed shall prevail