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水的品质优良与否，对浆和离型纸的质量有一定的影响，电容器纸、电气绝缘纸、照像纸和人造丝浆等，则需要比一般生产用水要求要高一些。 尤其是电容器纸和电气绝缘纸，要用阳离子和阴离子交换树脂处理过的水来进行生产。
Whether the quality of water is good or not has a certain impact on the quality of pulp and release paper, capacitor paper, electrical insulation paper, photographic paper and rayon pulp, etc. It needs to be higher than the general production water requirements. In particular, capacitor paper and electrical insulating paper are produced with water treated by cation and anion exchange resins.
对锅炉用水，所要求的质量则更高。因为硬水会使锅炉结垢，影响传热。而水中的氧气、二氧化碳及氯离子等则对锅炉壁有侵蚀作用。这些杂质含量稍高，对锅炉的运行不利。 所以锅炉用水必须经过软化、除氧和除盐等处理，使其质量符合锅炉用水标准。For boiler water, the required quality is higher. Because hard water can make boiler scale, affect heat transfer. The oxygen, carbon dioxide and chloride ions in the water are corrosive to the boiler wall. These slightly higher content of impurities, adverse to the operation of the boiler. So the boiler water must be softened, deoxygenated and desalted, so that its quality in line with boiler water standards.
水中的杂质含量过高，对纸浆和离型纸的质量有一定影响，如悬浮物含量高，除能增加纸张的尘埃外，还会降低离型纸的白度和强度。High content of impurities in water has certain influence on the quality of pulp and release paper, such as high suspended matter content. In addition to increasing paper dust, it reduces the whiteness and strength of release paper.
水中的硬度过高对离型纸施胶是不利的。主要原因是钙、镁盐过高时，这些盐类会与部分胶料作用，造成胶料的损失。Too high hardness in water is not good for sizing of release paper. The main reason is that when calcium and magnesium salts are too high, these salts will act with part of the glue, causing the loss of the glue.
此外用硬水洗涤碱法浆，因钙、镁离子与黑液中已溶解的树脂作用，生成不溶解的钙皂或镁皂，吸附或沉积于纤维上，造成漂白困难，更严重的还会引起树脂障碍。 水中含有铁、锰等金属离子，会在制浆造纸过程中吸附在纤维上，引起纸或浆变色，因此，一般制高级纸，规定水中含铁量不超过0.1——0.2毫克/升。 如照像原纸，若含铁量高，会使纸张产生黄色锈斑，严重影响使用要求。若水中氯离子含量过高，在制造某些高级纸或中性包装纸及防锈原纸等，会造成被包装的金属制品的腐蚀。
In addition, washing alkaline slurry with hard water will generate insoluble calcium soap or magnesium soap due to the effect of calcium and magnesium ions and dissolved resin in black liquor, which will adsorb or deposit on the fiber, causing bleaching difficulties, and more serious will cause resin obstacles. The water contains iron, manganese and other metal ions, will be in the process of pulp and paper adsorption on the fiber, causing paper or pulp discoloration, therefore, the general system of advanced paper, the provision of iron content in water does not exceed 0.1 -- 0.2 mg/l. Such as photographic base paper, if the iron content is high, the paper will produce yellow rust, seriously affect the use requirements. If the chloride ion content in water is too high, in the manufacture of some high-grade paper or neutral wrapping paper and anti-rust base paper, will cause the corrosion of the packaged metal products.
有机物常以胶体或溶解状态存在于水中。这是由水源经水流地带受污染及水中生长的藻类类等腐烂有机物质造成的。它使水产生颜色、浑浊，甚至发臭，因而用于制浆造纸时，纤维会对有机色素或胶质强烈地吸附。如用明矾处理会使这些物质沉淀于纸浆上，从而降低离型纸的白度或影响漂白过程的进行。
Organic matter often exists in water as colloid or dissolved. This is caused by polluted water and rotting organic matter such as algae growing in the water. It makes the water color, cloudy, and even smelly, so when used in pulp and paper, the fiber will be strongly adsorbed to organic pigments or colloid. If treated with alum, these substances will precipitate on the pulp, thus reducing the whiteness of the release paper or affecting the bleaching process.