As summer approaches and temperatures gradually rise, many hotel linen washing companies have found a significant increase in backwash volume, most of which are yellow stains, resulting in high customer complaint rates. So, why do these problems occur periodically every summer? There are two main reasons for this:

一水质原因

1. Water quality reasons

我们在春秋季节到河边会观察到水质清澈见底，而夏季的时候水质则较为浑浊，这是因为随着水温的升高，水的溶解能力大大增强，溶解到水中的物质导致水质不够清澈。同样的道理，我们夏季的洗涤用水，只要不是经过反渗透处理，或多或少都会比春秋季节的水质溶解更多杂质，而这些杂质在洗涤时会导致对布草的二次污染。

We observe clear water at the riverbank during the spring and autumn seasons, while in the summer, the water is relatively turbid. This is because as the water temperature increases, the solubility of the water is greatly enhanced, and the substances dissolved in the water cause the water to be not clear enough. Similarly, our summer washing water, as long as it is not treated with reverse osmosis, will more or less dissolve more impurities than the water quality in spring and autumn, and these impurities will cause secondary pollution to the linen during washing.

二污染原因

II. Causes of pollution

夏季气温升高，人体汗渍油脂分泌旺盛，相比较春秋季节会产生更多的人体排泄物污渍，而这类污渍如果不针对性进行洗涤，非常容易形成顽固性的固化黄斑。另外，由于夏季高温，客人有食用各种水果、饮料等消暑的需求，不可避免地会增加沾染到布草上的概率，因此也会导致黄斑污渍的增多。

Summer temperatures rise, and the human body secretes sweat and oil vigorously. Compared to spring and autumn seasons, more human excrement stains are produced. If these stains are not washed specifically, they are very likely to form stubborn solidified yellow spots. In addition, due to the high temperature in summer, customers have a need to consume various fruits, beverages, and other heat relieving foods, which inevitably increases the probability of getting infected with the cloth grass, thus leading to an increase in yellow spot stains.

针对该类污渍出现的原因，我们可以针对性进行以下几种洗涤工艺的改进：

We can make targeted improvements to the following washing processes to address the causes of such stains:

针对水中杂质的问题，我们建议使用富含高能效表面活性剂，尤其是富含螯合剂和抗再沉积剂的洗涤用品，可以有效螯合水中杂质，防止污渍沉积到布草上。

To address the issue of impurities in water, we recommend using washing products rich in high-energy efficient surfactants, especially those rich in chelating and anti redeposition agents, which can effectively chelate impurities in water and prevent stains from depositing on the linen.

针对人体排泄物类的污渍，因为混合了较多的蛋白质污渍，因此建议在洗涤程序上做一定的调整，建议进入主洗后不要着急升温，加入洗涤剂之后，升温到35度洗涤5—8分钟，即可将大部分的蛋白类污渍去除彻底，防止污渍的产生。同时，定期做好洗衣龙内部清理作业，若水垢未得到及时清理，长期在洗衣龙内沉淀后易形成污渍，附带在布草上。

For human excrement stains, it is recommended to make certain adjustments to the washing procedure due to the high mixture of protein stains. It is recommended not to heat up quickly after entering the main wash. After adding detergent, heat up to 35 degrees Celsius and wash for 5-8 minutes to completely remove most egg white stains and prevent the generation of stains. At the same time, regularly clean the interior of the laundry dragon. If the scale is not cleaned in a timely manner, it can easily form stains after long-term sedimentation in the laundry dragon, which can be attached to the cloth.

果汁、饮料、啤酒类产生的污渍，难以去除的是色素，如果常规洗涤使用的是彩漂粉或者是氧漂液，建议定期更换给氯漂粉或氯漂液，增大氯漂粉或氯漂液的使用频次，对于该类污渍的彻底去除更为有利！更多相关事项就来我们网站http://www.jnadx.com咨询！

Stains caused by fruit juices, beverages, and beer are difficult to remove due to pigments. If color bleaching powder or oxygen bleaching liquid are used for regular washing, it is recommended to regularly replace them with chlorine bleaching powder or chlorine bleaching liquid. Increasing the frequency of use of chlorine bleaching powder or chlorine bleaching liquid is more beneficial for the complete removal of such stains! For more related matters, come to our website http://www.jnadx.com consulting service