Water stains occur
1. Reason:
⑴The working fluid has poor stability. This can be determined by observing the surface layer of the working fluid after high-speed stirring and whether there is scum on the roll.
⑵ Malignant bubbles may occur. This can be touched by hand. If it agglomerates and turns into scum, it is a malignant bubble.
2. Main countermeasures:
⑴ Pay attention to control the temperature of the working fluid not to exceed 35C.
⑵ When malignant bubbles are found, add stabilizer (isopropyl alcohol).
⑶Use within the shelf life.
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