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:

一水質原因

1. Water quality reasons

我們在春秋季節到河邊會觀察到水質清澈見底，而夏季的時候水質則較為渾濁，這是因為隨著水溫的升高，水的溶解能力大大增強，溶解到水中的物質導致水質不夠清澈。同樣的道理，我們夏季的洗滌用水，只要不是經過反滲透處理，或多或少都會比春秋季節的水質溶解更多雜質，而這些雜質在洗滌時會導致對布草的二次污染。

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

夏季氣溫升高，人體汗漬油脂分泌旺盛，相比較春秋季節會產生更多的人體排泄物污漬，而這類污漬如果不針對性進行洗滌，非常容易形成頑固性的固化黃斑。另外，由于夏季高溫，客人有食用各種水果、飲料等消暑的需求，不可避免地會增加沾染到布草上的概率，因此也會導致黃斑污漬的增多。

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.

針對該類污漬出現的原因，我們可以針對性進行以下幾種洗滌工藝的改進：

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

針對水中雜質的問題，我們建議使用富含高能效表面活性劑，尤其是富含螯合劑和抗再沉積劑的洗滌用品，可以有效螯合水中雜質，防止污漬沉積到布草上。

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.

針對人體排泄物類的污漬，因為混合了較多的蛋白質污漬，因此建議在洗滌程序上做一定的調整，建議進入主洗后不要著急升溫，加入洗滌劑之后，升溫到35度洗滌5—8分鐘，即可將大部分的蛋白類污漬去除徹底，防止污漬的產生。同時，定期做好洗衣龍內部清理作業，若水垢未得到及時清理，長期在洗衣龍內沉淀后易形成污漬，附帶在布草上。

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、飲料、啤酒類產生的污漬，難以去除的是色素，如果常規洗滌使用的是彩漂粉或者是氧漂液，建議定期更換給氯漂粉或氯漂液，增大氯漂粉或氯漂液的使用頻次，對于該類污漬的徹底去除更為有利！更多相關事項就來我們網站http://www.caibozheng.cn咨詢！

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.caibozheng.cn consulting service