不干膠背印是不干膠背面印刷的簡稱，是指用印刷的方法在不干膠材料的粘合劑表面用油墨或涂料印刷圖文。一般背面印刷有兩個目的：
Self adhesive back printing is the abbreviation of self-adhesive back printing, which refers to the printing method of printing pictures and texts with ink or paint on the adhesive surface of self-adhesive materials. General back printing has two purposes:
①背面圖文印刷。在粘合劑表面印刷少量的文字或圖案，達到雙面標簽的目的。標簽用在裝有透明液體的透明瓶體上或玻璃上，通過透明瓶體或玻璃可清楚地看到標簽上的文字說
① Back graphic printing. A small amount of words or patterns are printed on the surface of the adhesive to achieve the purpose of double-sided label. The label is used on the transparent bottle or glass containing transparent liquid. The text on the label can be clearly seen through the transparent bottle or glass
明，起到一個標簽正反面兩用的作用。既節省了標簽材料和費用，又使商品具有特殊的裝潢效果。由于標簽結構的特殊性，所以背面印刷標簽有一定的防偽作用。
The utility model has the functions of both front and back sides of a label. It not only saves label materials and costs, but also makes the goods have a special decoration effect. Due to the particularity of label structure, the back printed label has a certain anti-counterfeiting effect.
②背面粘合劑遮蓋。某些標簽背面不需要全部涂有粘合劑，只需部分涂布。如具有可重貼、可移除特性的封口貼標簽，手指接觸部位不需要有膠；某些有背切的標簽，背切處為便于去掉底紙，不需要有膠。印刷廠為滿足以上需要，用印刷的方法在要求去掉粘合劑的位置上印上油墨等，蓋住粘合劑，使其不粘手，達到與原材料制造時局部涂布工藝相同的作用。
② Cover with adhesive on the back. Some labels do not need to be fully coated with adhesive on the back, but only partially coated. For example, there is no need to have glue on the finger contact part of the sealing label with the characteristics of re pasting and removal; For some labels with back cut, there is no need for glue at the back cut to remove the backing paper. In order to meet the above needs, the printing plant prints ink on the position where the adhesive is required to be removed by printing, covers the adhesive, and makes it non stick, so as to achieve the same effect as the local coating process during raw material manufacturing.
背面印刷適合小批量、要求精度不高的標簽。如大批量生產，應從原材料制造上根本解決，如背面圖文印刷，面料背面可預先印刷，然后再制造成標簽材料。而背面遮蓋標簽，可在材料制造時，用局部漏涂膠的方法制作專用材料，用特種材料加工標簽。這樣可提高標簽質量和生產效率。
The back printing is suitable for labels with small batch and low precision. In case of mass production, it should be fundamentally solved from the manufacturing of raw materials. For example, the back of the fabric can be pre printed and then manufactured into label materials. The back cover label can be used to make special materials and process labels with special materials during material manufacturing. This will improve label quality and productivity.
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