有皂垢是正常的嗎？
Is it normal to have soap scum?絕大多數潔面產品中，都含有皂基（皂類界面活性劑）。當遇到自來水中的鈣、鎂金屬離子時容易產生皂垢，常以為洗乾淨了的澀澀的 "清爽感" ，其實是手、水和皂垢摩擦產生的一種錯覺。所以，洗乾淨的純淨皮膚，怎麼可能摸起來澀澀的。軟水滑滑的，是不會有皂垢殘留的，洗時滑溜溜，洗後皮膚水嫩嫩、滑順。這與用含化學清潔產品洗完後的滑膩感、膜感，無法相提並論。其實，皂垢就是肌膚的隱形殺手，如果是使用化學合成洗劑、洗髮精、洗面乳、沐浴乳，皂垢會越積越多，不斷沉積在皮膚上。
The vast majority of cleansing products contain soap-based (soap-like surfactant) ingredients. When these ingredients encounter calcium and magnesium ions in tap water, they can create soap scum, which can create a "refreshing" sensation that is often mistaken for clean skin. However, this sensation is actually the result of the friction between your hands, water, and soap scum. Clean, pure skin should not feel rough or gritty. Soft water, which does not contain as many minerals, will not leave behind soap scum. When you use soft water to wash, your skin will feel smooth and soft, with no residue. This is in contrast to the slippery, filmy feeling you may get from using chemical cleaning products. Soap scum is actually a hidden danger to your skin, especially if you use synthetic chemical detergents, shampoos, cleansers, or body washes, as it can accumulate and deposit on your skin over time.皂垢問題最主要形成問題是水質！一般好的手工皂加上好的水質是不會產生皂垢！所以，沐浴家中使用的水最好可以考慮採用離子交換樹脂處理過的水較好！即軟水比硬水（地下水或自來水）好！
The main cause of soap scum is water quality! A good handmade soap combined with good quality water will not produce soap scum. Therefore, it is recommended to use water treated with ion exchange resin, such as soft water is better than hard water (groundwater or tap water)!