画面上的白点为干霉，可以先用鸡毛掸子轻轻扫除，再用热水冲洗两遍，白霉就可以去除。

　　The white spots on the screen are dry mold. You can first gently sweep them with a chicken feather duster, and then rinse them twice with hot water to remove the white mold.

　　如果白霉继续受潮而不处理，就会转化成绿色霉斑和黄色霉斑。 再发展下去就变成了红霉，这时候就要再太阳下晒一下，等待纸张完全干透，用干燥的小毛笔将霉点表面去除。 然后用热水冲洗一次，在霉点上先涂抹淡高锰酸钾溶液，等待颜色变成了紫色后，涂抹淡草酸水，一般情况下，霉斑即可去除。

　　If white mold continues to be damp without treatment, it will transform into green and yellow mold spots. If it continues to develop, it will become red mold. At this point, it needs to be sun dried again, wait for the paper to completely dry, and use a dry small brush to remove the surface of the mold. Then rinse with hot water once, apply a light potassium permanganate solution to the mold spots, wait for the color to turn purple, and then apply light oxalic acid water. Generally, the mold spots can be removed.

　　红霉难处理可以用淡淡的漂白粉局部进行处理，然后用清水冲洗即可。 黑霉是字画无法处理的霉，通常这种情况下的纸张纤维完全被破坏，所以直接使用淡漂白液即可，只是很难，甚纸张消失，需要挖掉再补。 以上办法都是使用酸性化学物质腐蚀霉斑，达到去除霉斑的方法，对字画纸张纤维有伤害。

　　The most difficult to treat red mold can be treated locally with light bleach, and then rinsed with clean water. Black mold is the most difficult mold to handle in calligraphy and painting. In this case, the paper fibers are completely destroyed, so using light bleach directly is sufficient. However, it is difficult to remove, and even the paper disappears. It needs to be dug out and repaired. The above methods all use acidic chemicals to corrode mold spots, achieving the method of removing mold spots and causing damage to the fibers of calligraphy and painting paper.