\u0110\u1ed9 pH trong s\u1ea3n ph\u1ea9m l\u00e0m \u0111\u1eb9p: Y\u1ebfu t\u1ed1 then ch\u1ed1t cho l\u00e0n da kh\u1ecfe m\u1ea1nh<\/h2>\n
\u0110\u1ed9 pH c\u1ee7a c\u00e1c s\u1ea3n ph\u1ea9m ch\u0103m s\u00f3c da, \u0111\u1eb7c bi\u1ec7t l\u00e0 s\u1eefa r\u1eeda m\u1eb7t, \u0111\u00f3ng vai tr\u00f2 quan tr\u1ecdng trong vi\u1ec7c duy tr\u00ec \u0111\u1ed9 \u1ea9m v\u00e0 s\u1ef1 m\u1ec1m m\u1ea1i cho l\u00e0n da. L\u1ef1a ch\u1ecdn s\u1ea3n ph\u1ea9m c\u00f3 \u0111\u1ed9 pH ph\u00f9 h\u1ee3p l\u00e0 \u0111i\u1ec1u c\u1ea7n thi\u1ebft, nh\u1ea5t l\u00e0 khi s\u1eed d\u1ee5ng th\u01b0\u1eddng xuy\u00ean.<\/p>\n
\u0110\u1ed9 pH l\u00e0 g\u00ec?<\/h2>\n
“pH” l\u00e0 vi\u1ebft t\u1eaft c\u1ee7a “Potential hydrogen” ho\u1eb7c “Power of Hydrogen”, \u0111o l\u01b0\u1eddng n\u1ed3ng \u0111\u1ed9 ion hydro trong m\u1ed9t dung d\u1ecbch. Thang \u0111o pH \u0111\u01b0\u1ee3c chia th\u00e0nh ba m\u1ee9c ch\u00ednh:<\/p>\n
- \n
- Axit:<\/strong> pH < 7.0<\/li>\n
- Trung t\u00ednh:<\/strong> pH = 7.0<\/li>\n
- Ki\u1ec1m (Ba-z\u01a1):<\/strong> pH > 7.0<\/li>\n<\/ul>\n
![\"\"](\"https:\/\/onsenaspa.s3.ap-southeast-1.amazonaws.com\/wp-content\/uploads\/2025\/12\/ty-le-gia-tri-do-ph_1102a0327cf342e99e6b9e1001b1124e_grande.jpg\" "\\"ty-le-gia-tri-do-ph_1102a0327cf342e99e6b9e1001b1124e_grande\\"")
\nThang \u0111o pH, t\u1eeb tr\u00e1i sang ph\u1ea3i: Axit, trung t\u00ednh, ki\u1ec1m.<\/em><\/p>\nC\u00e1c ch\u1ea5t c\u00f3 \u0111\u1ed9 pH d\u01b0\u1edbi 7.0 \u0111\u01b0\u1ee3c coi l\u00e0 c\u00f3 t\u00ednh axit, v\u00ed d\u1ee5 nh\u01b0 n\u01b0\u1edbc chanh (pH 2.2). Ng\u01b0\u1ee3c l\u1ea1i, c\u00e1c ch\u1ea5t c\u00f3 \u0111\u1ed9 pH tr\u00ean 7.0 c\u00f3 t\u00ednh ki\u1ec1m, nh\u01b0 baking soda (pH 9.0). V\u00ec v\u1eady, vi\u1ec7c s\u1eed d\u1ee5ng tr\u1ef1c ti\u1ebfp c\u00e1c nguy\u00ean li\u1ec7u n\u00e0y l\u00ean da c\u1ea7n c\u00e2n nh\u1eafc k\u1ef9 l\u01b0\u1ee1ng.<\/p>\n
T\u1ea7m quan tr\u1ecdng c\u1ee7a \u0111\u1ed9 pH s\u1eefa r\u1eeda m\u1eb7t<\/h2>\n
Da c\u1ee7a ch\u00fang ta \u0111\u01b0\u1ee3c bao ph\u1ee7 b\u1edfi m\u1ed9t l\u1edbp m\u00e0ng \u1ea9m t\u1ef1 nhi\u00ean, c\u00f3 t\u00ednh axit nh\u1eb9 v\u1edbi \u0111\u1ed9 pH l\u00fd t\u01b0\u1edfng dao \u0111\u1ed9ng t\u1eeb 4.5 \u0111\u1ebfn 6.2. L\u1edbp m\u00e0ng n\u00e0y \u0111\u00f3ng vai tr\u00f2 nh\u01b0 m\u1ed9t h\u00e0ng r\u00e0o b\u1ea3o v\u1ec7 da kh\u1ecfi c\u00e1c t\u00e1c nh\u00e2n g\u00e2y h\u1ea1i t\u1eeb m\u00f4i tr\u01b0\u1eddng nh\u01b0 b\u1ee5i b\u1ea9n, \u00f4 nhi\u1ec5m, \u00e1nh n\u1eafng m\u1eb7t tr\u1eddi, v\u00e0 c\u1ea3 c\u00e1c s\u1ea3n ph\u1ea9m ch\u0103m s\u00f3c da kh\u00f4ng ph\u00f9 h\u1ee3p.<\/p>\n
\u0110\u1ed9 pH c\u1ee7a s\u1eefa r\u1eeda m\u1eb7t, c\u0169ng nh\u01b0 c\u00e1c s\u1ea3n ph\u1ea9m l\u00e0m \u0111\u1eb9p kh\u00e1c, c\u00f3 t\u00e1c \u0111\u1ed9ng tr\u1ef1c ti\u1ebfp \u0111\u1ebfn s\u1ee9c kh\u1ecfe l\u00e0n da. Vi\u1ec7c l\u1ef1a ch\u1ecdn s\u1eefa r\u1eeda m\u1eb7t c\u00f3 \u0111\u1ed9 pH ph\u00f9 h\u1ee3p l\u00e0 m\u1ed9t ti\u00eau chu\u1ea9n quan tr\u1ecdng m\u00e0 nhi\u1ec1u ng\u01b0\u1eddi ch\u01b0a ch\u00fa tr\u1ecdng \u0111\u00fang m\u1ee9c. M\u1ee5c ti\u00eau ch\u00ednh c\u1ee7a s\u1eefa r\u1eeda m\u1eb7t l\u00e0 l\u00e0m s\u1ea1ch hi\u1ec7u qu\u1ea3 m\u00e0 kh\u00f4ng g\u00e2y t\u1ed5n th\u01b0\u01a1ng cho l\u1edbp m\u00e0ng b\u1ea3o v\u1ec7 t\u1ef1 nhi\u00ean c\u1ee7a da.<\/p>\n
![\"\u0111\u1ed9](\"https:\/\/onsenaspa.s3.ap-southeast-1.amazonaws.com\/wp-content\/uploads\/2025\/12\/ph-sua-rua-mat-anh-huong-lop-mang-sinh-ly_58c63398d46e40ee9632eb6183b0b4b7_1024x1024.jpg\" "\\"ph-sua-rua-mat-anh-huong-lop-mang-sinh-ly_58c63398d46e40ee9632eb6183b0b4b7_1024x1024\\"")
\n\u0110\u1ed9 pH c\u1ee7a s\u1eefa r\u1eeda m\u1eb7t \u1ea3nh h\u01b0\u1edfng tr\u1ef1c ti\u1ebfp \u0111\u1ebfn l\u1edbp m\u00e0ng sinh h\u1ecdc b\u1ea3o v\u1ec7 da.<\/em><\/p>\n\u0110\u1ed9 pH l\u00fd t\u01b0\u1edfng cho s\u1eefa r\u1eeda m\u1eb7t<\/h2>\n
\u0110\u1ec3 kh\u00f4ng l\u00e0m m\u1ea5t \u0111i l\u1edbp d\u1ea7u t\u1ef1 nhi\u00ean v\u00e0 gi\u1eef cho da m\u1ec1m m\u1ea1i, s\u1eefa r\u1eeda m\u1eb7t n\u00ean c\u00f3 \u0111\u1ed9 pH c\u00e2n b\u1eb1ng trong kho\u1ea3ng 4.5 – 5.5, v\u1edbi kh\u1ea3 n\u0103ng l\u00e0m s\u1ea1ch nh\u1eb9 nh\u00e0ng.<\/p>\n
S\u1eed d\u1ee5ng s\u1eefa r\u1eeda m\u1eb7t c\u00f3 \u0111\u1ed9 pH qu\u00e1 cao ho\u1eb7c qu\u00e1 th\u1ea5p \u0111\u1ec1u c\u00f3 th\u1ec3 g\u00e2y t\u1ed5n th\u01b0\u01a1ng, b\u00e0o m\u00f2n l\u1edbp axit t\u1ef1 nhi\u00ean tr\u00ean da, d\u1eabn \u0111\u1ebfn t\u00ecnh tr\u1ea1ng da nh\u1ea1y c\u1ea3m v\u00e0 d\u1ec5 b\u1ecb k\u00edch \u1ee9ng.<\/p>\n
- \n
- S\u1eefa r\u1eeda m\u1eb7t c\u00f3 t\u00ednh axit (pH < 7.0):<\/strong> C\u00f3 th\u1ec3 h\u1ed7 tr\u1ee3 hi\u1ec7u qu\u1ea3 trong vi\u1ec7c \u0111i\u1ec1u tr\u1ecb m\u1ee5n.<\/li>\n
- S\u1ea3n ph\u1ea9m l\u00e0m s\u1ea1ch c\u00f3 t\u00ednh ki\u1ec1m (pH > 7.0):<\/strong> C\u00f3 kh\u1ea3 n\u0103ng h\u1ed7 tr\u1ee3 gi\u1ea3m nh\u1eb9 c\u00e1c v\u1ea5n \u0111\u1ec1 v\u1ec1 da nh\u01b0 ch\u00e0m, v\u1ea3y n\u1ebfn.<\/li>\n<\/ul>\n
\u0110\u1ed9 pH th\u00f4ng th\u01b0\u1eddng c\u1ee7a da l\u00e0 kho\u1ea3ng 5.5. Da kh\u00f4 c\u00f3 xu h\u01b0\u1edbng c\u00f3 t\u00ednh axit cao h\u01a1n (pH 5.5). Vi\u1ec7c x\u00e1c \u0111\u1ecbnh lo\u1ea1i da c\u1ee7a b\u1ea1n s\u1ebd gi\u00fap l\u1ef1a ch\u1ecdn s\u1eefa r\u1eeda m\u1eb7t c\u00f3 \u0111\u1ed9 pH ph\u00f9 h\u1ee3p h\u01a1n.<\/p>\n
C\u00e1ch ki\u1ec3m tra lo\u1ea1i da nhanh ch\u00f3ng b\u1eb1ng gi\u1ea5y th\u1ea5m d\u1ea7u<\/h3>\n
- \n
- Sau khi l\u00e0m s\u1ea1ch da m\u1eb7t, ch\u1edd kho\u1ea3ng 30 ph\u00fat \u0111\u1ec3 da tr\u1edf v\u1ec1 tr\u1ea1ng th\u00e1i c\u00e2n b\u1eb1ng t\u1ef1 nhi\u00ean.<\/li>\n
- D\u00f9ng gi\u1ea5y th\u1ea5m d\u1ea7u m\u1ec1m \u00e1p nh\u1eb9 l\u00ean v\u00f9ng tr\u00e1n, m\u0169i, c\u1eb1m v\u00e0 hai b\u00ean m\u00e1 trong v\u00e0i gi\u00e2y.<\/li>\n
- Quan s\u00e1t k\u1ebft qu\u1ea3:<\/li>\n<\/ol>\n
* Gi\u1ea5y th\u1ea5m d\u1ea7u \u1ea9m \u0111\u1ec1u tr\u00ean to\u00e0n b\u1ed9 khu\u00f4n m\u1eb7t:<\/strong> Cho th\u1ea5y da ti\u1ebft nhi\u1ec1u d\u1ea7u, thu\u1ed9c lo\u1ea1i da nh\u1eddn, th\u01b0\u1eddng b\u00f3ng v\u00e0 c\u00f3 l\u1ed7 ch\u00e2n l\u00f4ng to.
\n * Gi\u1ea5y th\u1ea5m d\u1ea7u v\u00f9ng tr\u00e1n, m\u0169i, c\u1eb1m c\u00f3 v\u1ec7t d\u1ea7u nh\u01b0ng v\u00f9ng m\u00e1 kh\u00f4 r\u00e1o:<\/strong> Kh\u1ea3 n\u0103ng cao l\u00e0 da h\u1ed7n h\u1ee3p ho\u1eb7c da th\u01b0\u1eddng.
\n * Gi\u1ea5y th\u1ea5m d\u1ea7u kh\u00f4ng c\u00f3 d\u1ea5u hi\u1ec7u d\u1ea7u:<\/strong> Ch\u1ee9ng t\u1ecf da b\u1ea1n thu\u1ed9c lo\u1ea1i da kh\u00f4.<\/p>\nC\u00f3 n\u00ean s\u1eed d\u1ee5ng toner sau s\u1eefa r\u1eeda m\u1eb7t kh\u00f4ng?<\/h2>\n
C\u00f4ng d\u1ee5ng ch\u00ednh c\u1ee7a toner<\/h3>\n
Toner \u0111\u00f3ng vai tr\u00f2 quan tr\u1ecdng trong vi\u1ec7c c\u00e2n b\u1eb1ng l\u1ea1i \u0111\u1ed9 pH cho da sau khi r\u1eeda m\u1eb7t, gi\u00fap l\u00e0n da kh\u1ecfe m\u1ea1nh h\u01a1n.<\/p>\n
N\u00ean hay kh\u00f4ng n\u00ean?<\/h3>\n
N\u1ebfu s\u1eefa r\u1eeda m\u1eb7t b\u1ea1n \u0111ang s\u1eed d\u1ee5ng c\u00f3 t\u00ednh ki\u1ec1m, vi\u1ec7c s\u1eed d\u1ee5ng toner l\u00e0 c\u1ea7n thi\u1ebft \u0111\u1ec3 kh\u00f4i ph\u1ee5c l\u1ea1i \u0111\u1ed9 pH c\u00e2n b\u1eb1ng cho da. Tuy nhi\u00ean, n\u1ebfu s\u1eefa r\u1eeda m\u1eb7t \u0111\u00e3 c\u00f3 \u0111\u1ed9 pH ph\u00f9 h\u1ee3p, th\u00ec vi\u1ec7c d\u00f9ng toner kh\u00f4ng c\u00f2n l\u00e0 b\u1eaft bu\u1ed9c. Ng\u00e0y nay, c\u00e1c lo\u1ea1i toner \u0111\u01b0\u1ee3c t\u00edch h\u1ee3p nhi\u1ec1u c\u00f4ng d\u1ee5ng kh\u00e1c nhau nh\u01b0 h\u1ed7 tr\u1ee3 tr\u1ecb m\u1ee5n, ch\u1ed1ng l\u00e3o h\u00f3a, l\u00e0m d\u1ecbu da, v.v., do \u0111\u00f3, vi\u1ec7c b\u1ed5 sung toner v\u00e0o quy tr\u00ecnh ch\u0103m s\u00f3c da v\u1eabn l\u00e0 m\u1ed9t b\u01b0\u1edbc \u0111\u00e1ng c\u00e2n nh\u1eafc.<\/p>\n
- S\u1ea3n ph\u1ea9m l\u00e0m s\u1ea1ch c\u00f3 t\u00ednh ki\u1ec1m (pH > 7.0):<\/strong> C\u00f3 kh\u1ea3 n\u0103ng h\u1ed7 tr\u1ee3 gi\u1ea3m nh\u1eb9 c\u00e1c v\u1ea5n \u0111\u1ec1 v\u1ec1 da nh\u01b0 ch\u00e0m, v\u1ea3y n\u1ebfn.<\/li>\n<\/ul>\n
- Trung t\u00ednh:<\/strong> pH = 7.0<\/li>\n