PH值過高對人體的影響

The impact of high pH on the human body

人的皮膚表面分泌出的汗液和皮脂的混合物經檢驗測定：東方人皮膚的PH值一般為4.5～6.5，這是人體皮膚分泌的尿素、尿酸、鹽分、乳酸、脂肪酸、游離脂肪酸、中性脂肪等混合物的PH值。由于在人體表面存留著這么多的酸性物質，使皮膚的平均PH值為5.75，呈弱酸性。它能抑制體表細菌的寄生，這種殺菌能力被稱為皮膚的自我凈化。皮膚呈堿性拾，不但細菌易繁殖，而且對刺激性物質的抵抗力也下降。

The mixture of sweat and sebum secreted on the surface of human skin has been tested and determined: the pH value of Oriental skin is generally 4.5-6.5, which is the pH value of the mixture of urea, uric acid, salt, lactic acid, fatty acids, free fatty acids, neutral fats and other substances secreted by human skin. Due to the presence of so many acidic substances on the surface of the human body, the average pH value of the skin is 5.75, which is weakly acidic. It can inhibit the parasitism of surface bacteria, and this bactericidal ability is known as the self purification of the skin. The skin is alkaline, which not only makes it easy for bacteria to reproduce, but also reduces its resistance to irritating substances.

堿性比較強的洗滌劑殘留于布草，一般脫脂力比較強，與皮膚的酸性物質會發生中和反應。這種反應會引起皮膚干燥、產生刺激性、引起人體過敏和某些皮膚病，對皮膚造成損害。我們的皮膚是弱酸性的，這種弱酸性是為了保護我們的肌膚抵御外來的細菌對皮膚的侵害。如果我們接觸和使用了PH值偏高的布草，那么就破壞了我們皮膚原有的自我保護作用，直接影響到我們的人身健康和安全。

Detergents with strong alkalinity remain in linen and generally have strong degreasing power, which can neutralize acidic substances in the skin. This reaction can cause skin dryness, irritation, allergies, and certain skin diseases, causing damage to the skin. Our skin is weakly acidic, which is designed to protect our skin from the invasion of foreign bacteria. If we come into contact with and use cloth with a high pH value, it disrupts the original self-protection function of our skin, directly affecting our personal health and safety.

2、PH值過高對布草的影響

2. The impact of high pH value on linen

堿性洗滌劑在布草上的殘留影響。雖然堿性洗滌劑在洗滌過程中對棉纖維是安全的，不會損傷布草的纖維，但堿性洗滌劑殘留在纖維之內，烘干或燙平后，會使布草發灰變硬，板結。

The residual effect of alkaline detergent on linen. Although alkaline detergents are safe for cotton fibers during the washing process and do not damage the fibers of the linen, alkaline detergents remain within the fibers and can cause the linen to turn gray, hard, and harden after drying or ironing.、

洗滌的水質影響。據調查目前大部分洗滌部(公司)仍采用地表水、地下水、自來水等硬水洗滌，采用軟水洗滌很少。硬水用于過水清洗，硬水中的鈣鎂等金屬離子在PH值較高時容易生成不溶性鹽類在布草上沉積，使白色布草產生發灰現象，影響白度和手感，使顏色布草的色彩變暗，失去光澤。鈣鎂等金屬離子在布草上沉積，于纖維的粘附是相當牢固的，要把布草上粘附的鈣鎂等金屬離子洗除，使發灰的白色布草變白，在目前的情況來講，解決這個問題對布草沒有損失時相當困難的。

The impact of washing on water quality. According to the survey, most washing departments (companies) still use hard water such as surface water, groundwater, and tap water for washing, and rarely use soft water for washing. Hard water is used for washing with water. Metal ions such as calcium and magnesium in hard water are prone to form insoluble salts when the pH value is high, which can deposit on the fabric, causing the white fabric to turn gray, affecting its whiteness and texture, making the color of the fabric darker and lose its luster. Metal ions such as calcium and magnesium deposit on the fabric, and their adhesion to the fibers is quite strong. It is necessary to wash away the metal ions such as calcium and magnesium adhering to the fabric, making the gray white fabric turn white. In the current situation, solving this problem is quite difficult when there is no loss of fabric.

鐵等顯色金屬在水中并不以金屬形態存在，而是以離子或離子化合物形式存在，如果這些水在采用堿性洗滌劑加熱洗滌布草或采用氧化劑漂洗時，由于PH值較高會形成顯色金屬化合物。如鐵銹(氫氧化鐵)沉積在布草上成為一些棕色的斑點，也會使白色布草整體變黃，使眼色布草色彩變淡、變暗。

Iron and other color developing metals do not exist in the form of metals in water, but in the form of ions or ionic compounds. If these waters are heated with alkaline detergents to wash linen or rinsed with oxidants, they will form color developing metal compounds due to their high pH value. If rust (iron hydroxide) deposits on the cloth and becomes some brown spots, it can also make the white cloth turn yellow as a whole, making the color of the cloth lighter and darker.

對毛巾類柔軟效果的影響。柔軟劑一般采用陽離子表面活性劑。使用時應避免使用質量太差的水(如折合CaCO3計硬度大于100ppm以上的水)，盡量洗凈殘留在布草上的殘余堿(PH值高)和洗滌劑的陰離子活性物以免影響柔軟質量。過水不清、水質太差、堿性洗滌劑和陰離子活性物殘留于毛巾纖維之內，很大程度上會抑制和抵消柔軟劑的作用，毛巾烘干后，會使毛巾發灰變硬，柔軟效果不佳。

The impact on the softness effect of towels. Softeners generally use cationic surfactants. When using, it is necessary to avoid using water with poor quality (such as water with a CaCO3 hardness greater than 100ppm), and try to clean the residual alkali (high pH value) and anionic active substances of the detergent on the cloth as much as possible to avoid affecting the softness quality. Unclear water flow, poor water quality, residual alkaline detergents and anionic active substances in towel fibers can greatly inhibit and counteract the effect of softeners. After drying the towel, it will make it gray and hard, resulting in poor softening effect.

用于過水清洗，硬水中的鈣鎂等金屬離子在PH值較高時容易生成不溶性鹽類在布草上沉積，使白色布草產生發灰現象，影響白度和手感，使顏色布草的色彩變暗，失去光澤。鈣鎂等金屬離子在布草上沉積，于纖維的粘附是相當牢固的，要把布草上粘附的鈣鎂等金屬離子洗除，使發灰的白色布草變白，在目前的情況來講，解決這個問題對布草沒有損失時相當困難的。

Used for water cleaning, metal ions such as calcium and magnesium in hard water are prone to form insoluble salts when the pH value is high, which can deposit on the linen, causing the white linen to turn gray, affecting whiteness and texture, making the color of the linen darker and lose its luster. Metal ions such as calcium and magnesium deposit on the fabric, and their adhesion to the fibers is quite strong. It is necessary to wash away the metal ions such as calcium and magnesium adhering to the fabric, making the gray white fabric turn white. In the current situation, solving this problem is quite difficult when there is no loss of fabric.

鐵等顯色金屬在水中并不以金屬形態存在，而是以離子或離子化合物形式存在，如果這些水在采用堿性洗滌劑加熱洗滌布草或采用氧化劑漂洗時，由于PH值較高會形成顯色金屬化合物。如鐵銹(氫氧化鐵)沉積在布草上成為一些棕色的斑點，也會使白色布草整體變黃，使眼色布草色彩變淡、變暗。

Iron and other color developing metals do not exist in the form of metals in water, but in the form of ions or ionic compounds. If these waters are heated with alkaline detergents to wash linen or rinsed with oxidants, they will form color developing metal compounds due to their high pH value. If rust (iron hydroxide) deposits on the cloth and becomes some brown spots, it can also make the white cloth turn yellow as a whole, making the color of the cloth lighter and darker.

對毛巾類柔軟效果的影響。柔軟劑一般采用陽離子表面活性劑。使用時應避免使用質量太差的水(如折合CaCO3計硬度大于100ppm以上的水)，盡量洗凈殘留在布草上的殘余堿(PH值高)和洗滌劑的陰離子活性物以免影響柔軟質量。過水不清、水質太差、堿性洗滌劑和陰離子活性物殘留于毛巾纖維之內，很大程度上會抑制和抵消柔軟劑的作用，毛巾烘干后，會使毛巾發灰變硬，柔軟效果不佳。但鐵離子的水平卻只能有0.2ppm，PH值的正確控制可以降低鐵離子與柔軟劑的結合顯色)。

The impact on the softness effect of towels. Softeners generally use cationic surfactants. When using, it is necessary to avoid using water with poor quality (such as water with a CaCO3 hardness greater than 100ppm), and try to clean the residual alkali (high pH value) and anionic active substances of the detergent on the cloth as much as possible to avoid affecting the softness quality. Unclear water flow, poor water quality, residual alkaline detergents and anionic active substances in towel fibers can greatly inhibit and counteract the effect of softeners. After drying the towel, it will make it gray and hard, resulting in poor softening effect. However, the level of iron ions can only reach 0.2ppm, and proper pH control can reduce the binding color of iron ions with softeners.

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