{"id":6929,"date":"2026-05-29T18:22:43","date_gmt":"2026-05-29T16:22:43","guid":{"rendered":"https:\/\/xiaomoxuan.cz\/?page_id=6929"},"modified":"2026-05-29T18:22:43","modified_gmt":"2026-05-29T16:22:43","slug":"shampoo-for-colour-treated-hair-complete-guide","status":"publish","type":"page","link":"https:\/\/xiaomoxuan.cz\/en\/expert-tips\/shampoo-for-colour-treated-hair-complete-guide\/","title":{"rendered":"How to choose a shampoo for colour-treated hair"},"content":{"rendered":"<p><\/p>\n<article class=\"article-wrap\" itemscope itemtype=\"https:\/\/schema.org\/Article\">\n<section class=\"article-header\">\n<p class=\"article-lead\">Shampoo is the first and most important step in caring for colour-treated hair. We explain what actually affects colour longevity \u2014 and how to read an ingredient list without the marketing noise.<\/p>\n<\/section>\n<section>\n<nav class=\"toc\" aria-label=\"Article contents\">\n<ol>\n<li><a href=\"#chomu-vazhlyvyi\">Why shampoo matters more than your mask<\/a><\/li>\n<li><a href=\"#sulfaty\">Sulphates: why they destroy colour<\/a><\/li>\n<li><a href=\"#ph\">Shampoo pH and hair colour<\/a><\/li>\n<li><a href=\"#sklad\">What to look for in the ingredient list<\/a><\/li>\n<li><a href=\"#mify\">3 marketing claims not to believe<\/a><\/li>\n<li><a href=\"#yak-mytysya\">How to wash colour-treated hair correctly<\/a><\/li>\n<li><a href=\"#faq\">Frequently asked questions<\/a><\/li>\n<\/ol>\n<\/nav>\n<\/section>\n<section>\n<div class=\"article-body\" itemprop=\"articleBody\">\n<h2 id=\"chomu-vazhlyvyi\">Why shampoo matters more than your mask<\/h2>\n<p>Most people spend more attention on masks and conditioners \u2014 and less on shampoo. The logic is understandable: a mask &#8220;nourishes&#8221;, shampoo just &#8220;cleans&#8221;. But shampoo is what contacts your hair most frequently, and it&#8217;s the first thing that determines how long your colour lasts.<\/p>\n<p>Every time you wash your hair, shampoo <strong>acts on the cuticle both mechanically and chemically<\/strong> \u2014 the outer protective layer of the hair shaft. If that action is aggressive, the cuticle opens, pigment washes out, and no mask can restore the colour that was lost during washing.<\/p>\n<div class=\"callout callout--info\">\n        <span class=\"callout__label\">Simple principle<\/span><br \/>\n        A mask restores what a shampoo may have damaged. But when the shampoo is right, a mask simply maintains and improves. Start building your haircare routine with shampoo \u2014 not with a mask.\n      <\/div>\n<\/p><\/div>\n<\/section>\n<section>\n<h2 id=\"sulfaty\">Sulphates: why they destroy colour<\/h2>\n<p>Sulphates are surfactants that create lather and degrease hair. The most common ones are <strong>Sodium Lauryl Sulfate (SLS)<\/strong> and <strong>Sodium Laureth Sulfate (SLES)<\/strong>.<\/p>\n<p>For colour-treated hair they are problematic for two reasons:<\/p>\n<ul class=\"step-list\">\n<li>\n<div class=\"step-content\">\n          <strong>They open the cuticle<\/strong><br \/>\n          <span>Sulphates are alkaline. They raise the hair&#8217;s pH, causing the cuticle scales to lift. Through an open cuticle, pigment escapes with every wash.<\/span>\n        <\/div>\n<\/li>\n<li>\n<div class=\"step-content\">\n          <strong>They dissolve the lipid layer<\/strong><br \/>\n          <span>The cuticle is protected by a natural lipid layer. Sulphates break it down \u2014 hair becomes drier, more porous, and loses colour even faster.<\/span>\n        <\/div>\n<\/li>\n<li>\n<div class=\"step-content\">\n          <strong>They directly wash out pigment<\/strong><br \/>\n          <span>Some dyes \u2014 especially direct dyes (reds, purples, coppers) \u2014 are partially water-soluble. Sulphates accelerate their removal several times over.<\/span>\n        <\/div>\n<\/li>\n<\/ul>\n<div class=\"callout callout--warn\">\n      <span class=\"callout__label\">Important<\/span><br \/>\n      SLES is a milder version of SLS, but still not ideal for colour-treated hair. If any ingredient ending in <strong>&#8220;Sulfate&#8221;<\/strong> appears in the list \u2014 that shampoo is not suited to regular use on colour-treated hair.\n    <\/div>\n<h3>What replaces sulphates in good shampoos<\/h3>\n<p>Mild sulphate-free surfactants clean just as effectively without aggressively opening the cuticle. Look for these in the ingredient list:<\/p>\n<table class=\"compare-table\" aria-label=\"Surfactant comparison\">\n<thead>\n<tr>\n<th>Ingredient name<\/th>\n<th>Type<\/th>\n<th>Suitable for colour-treated hair<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>Sodium Lauryl Sulfate (SLS)<\/td>\n<td>Sulphate<\/td>\n<td class=\"td-bad\">No<\/td>\n<\/tr>\n<tr>\n<td>Sodium Laureth Sulfate (SLES)<\/td>\n<td>Sulphate<\/td>\n<td class=\"td-bad\">Not recommended<\/td>\n<\/tr>\n<tr>\n<td>Cocamidopropyl Betaine<\/td>\n<td>Amphoteric<\/td>\n<td class=\"td-good\">Yes<\/td>\n<\/tr>\n<tr>\n<td>Sodium Cocoyl Isethionate<\/td>\n<td>Mild anionic<\/td>\n<td class=\"td-good\">Yes<\/td>\n<\/tr>\n<tr>\n<td>Decyl Glucoside \/ Coco Glucoside<\/td>\n<td>Non-ionic (plant-based)<\/td>\n<td class=\"td-good\">Yes<\/td>\n<\/tr>\n<tr>\n<td>Sodium Lauroyl Sarcosinate<\/td>\n<td>Mild anionic<\/td>\n<td class=\"td-good\">Yes<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/section>\n<section>\n<h2 id=\"ph\">Shampoo pH and hair colour<\/h2>\n<p>pH is the measure of acidity or alkalinity. Healthy hair has a pH of <strong>4.5\u20135.5<\/strong> (mildly acidic). At this pH the cuticle is closed, lies flat, and colour is preserved.<\/p>\n<p>Most standard shampoos have a pH of <strong>6\u20138<\/strong> \u2014 alkaline. This opens the cuticle. After every wash with such a shampoo, hair needs time and conditioner to return to its natural pH.<\/p>\n<div class=\"callout callout--tip\">\n      <span class=\"callout__label\">How to check pH at home<\/span><br \/>\n      pH test strips are available from pharmacies and are inexpensive. Place a drop of shampoo on the strip. A reading of 4.5\u20135.5 is ideal for colour-treated hair. Above 6 and the shampoo will open the cuticle with every wash.\n    <\/div>\n<p>Shampoos marketed as &#8220;for colour-treated hair&#8221; usually fall within the correct pH range \u2014 but not always. The most reliable approach is to check, or to choose a brand that states its pH clearly on the packaging.<\/p>\n<\/section>\n<section>\n<h2 id=\"sklad\">What to look for in the ingredient list<\/h2>\n<p>Beyond the absence of sulphates and a correct pH, a good shampoo for colour-treated hair contains active ingredients that further protect both colour and structure:<\/p>\n<h3>Hydrolysed collagen<\/h3>\n<p>Fills the micro-gaps of porous hair, densifying the shaft structure. The result: pigment escapes more slowly and hair looks fuller and shinier.<\/p>\n<h3>Panthenol (pro-vitamin B5)<\/h3>\n<p>Hydrates from within, reduces static and brittleness. Colour-treated hair is often dry \u2014 panthenol compensates for this without weighing hair down.<\/p>\n<h3>Tea tree extract<\/h3>\n<p>Soothes the scalp, which can be sensitive after the chemical process of colouring. Has mild antibacterial properties \u2014 useful for those prone to dandruff or irritation.<\/p>\n<h3>Plant oils (argan, jojoba, shea)<\/h3>\n<p>Restore the lipid layer of the cuticle that is broken down during colouring. Hair becomes softer, the cuticle lies flatter \u2014 and colour appears more saturated as a result.<\/p>\n<h3>UV filters<\/h3>\n<p>Sunlight fades colour-treated hair just as heat does. If you spend a lot of time outdoors, look for <strong>Benzophenone-4<\/strong> or similar UV filters in the formula.<\/p>\n<div class=\"callout callout--gold\">\n      <span class=\"callout__label\">How to read an ingredient list<\/span><br \/>\n      Ingredients are listed in descending order of concentration. If collagen or panthenol appear at the very end of a long list \u2014 there is very little of them in the formula. Look for products where the beneficial ingredients appear in the first half of the list.\n    <\/div>\n<\/section>\n<section>\n<h2 id=\"mify\">3 marketing claims not to believe<\/h2>\n<h3>&#8220;Protects colour 100%&#8221;<\/h3>\n<p>No shampoo stops colour from fading entirely \u2014 it&#8217;s physically impossible. A good shampoo <em>slows down<\/em> the process. &#8220;100% colour protection&#8221; is marketing without any evidence base.<\/p>\n<h3>&#8220;For all types of colour-treated hair&#8221;<\/h3>\n<p>Colour-treated hair varies enormously: freshly coloured and healthy, porous after many treatments, bleached, toned. A universal shampoo &#8220;for everyone&#8221; is a compromise that is optimal for no one. Choose based on the current condition of your hair, not a broad category.<\/p>\n<h3>&#8220;Natural = safe for colour&#8221;<\/h3>\n<p>Some natural ingredients \u2014 certain essential oils or citric acid at high concentrations \u2014 can interact with hair dye. &#8220;Natural&#8221; does not automatically mean &#8220;suitable for colour-treated hair&#8221;. What matters is the specific formula, not the marketing category.<\/p>\n<\/section>\n<section>\n<h2 id=\"yak-mytysya\">How to wash colour-treated hair correctly<\/h2>\n<p>Even the right shampoo can&#8217;t compensate for poor washing technique. A few rules that will keep your colour lasting longer:<\/p>\n<ul class=\"step-list\">\n<li>\n<div class=\"step-content\">\n          <strong>Wash less often \u2014 but properly<\/strong><br \/>\n          <span>Every wash is stress for colour-treated hair. If possible, reduce frequency from daily to 2\u20133 times a week. Dry shampoo between washes is your ally.<\/span>\n        <\/div>\n<\/li>\n<li>\n<div class=\"step-content\">\n          <strong>Use warm water, not hot<\/strong><br \/>\n          <span>Hot water opens the cuticle just as alkaline shampoo does. Wash with warm water and finish with a cool rinse \u2014 cold water closes the cuticle and adds shine.<\/span>\n        <\/div>\n<\/li>\n<li>\n<div class=\"step-content\">\n          <strong>Apply shampoo only to the roots<\/strong><br \/>\n          <span>The scalp produces sebum and needs cleansing. The lengths will be rinsed clean as the shampoo runs through. Don&#8217;t work shampoo through your full length \u2014 it&#8217;s unnecessary stress for colour-treated ends.<\/span>\n        <\/div>\n<\/li>\n<li>\n<div class=\"step-content\">\n          <strong>Don&#8217;t shampoo twice unless necessary<\/strong><br \/>\n          <span>&#8220;Lather, rinse, repeat&#8221; is a standard instruction on shampoo bottles \u2014 but for colour-treated hair it isn&#8217;t relevant. One wash is sufficient when you&#8217;re washing regularly.<\/span>\n        <\/div>\n<\/li>\n<li>\n<div class=\"step-content\">\n          <strong>Always follow with conditioner<\/strong><br \/>\n          <span>Conditioner closes the cuticle that shampoo may have slightly opened \u2014 even with the right formula. It&#8217;s the final line of defence before your hair meets a towel and a hairdryer.<\/span>\n        <\/div>\n<\/li>\n<\/ul>\n<div class=\"cta-container\">\n<h3>Xiaomoxuan shampoo for colour-treated hair<\/h3>\n<p>Sulphate-free and paraben-free. Formulated with mild surfactants, hydrolysed collagen and tea tree extract. Suitable for daily or regular use on colour-treated, bleached and chemically processed hair.<\/p>\n<div class=\"button-container\">\n        <a href=\"\/en\/sklep\/\" class=\"button-green\">Browse shampoos<\/a><br \/>\n        <a href=\"\/en\/expert-tips\/\" class=\"button-white\">More expert tips<\/a>\n      <\/div>\n<\/p><\/div>\n<\/section>\n<section class=\"faq-section\" id=\"faq\" itemscope itemtype=\"https:\/\/schema.org\/FAQPage\">\n<h2>Frequently asked questions about shampoo for colour-treated hair<\/h2>\n<details class=\"faq-details\" itemscope itemprop=\"mainEntity\" itemtype=\"https:\/\/schema.org\/Question\">\n<summary itemprop=\"name\">Can I use a regular shampoo on colour-treated hair?<\/summary>\n<div class=\"faq-answer\" itemscope itemprop=\"acceptedAnswer\" itemtype=\"https:\/\/schema.org\/Answer\">\n<p itemprop=\"text\">You can, but your colour will fade significantly faster. Standard shampoos contain sulphates and have an alkaline pH \u2014 both factors open the cuticle and accelerate pigment loss. If your colour service is an investment, or you want to extend the life of your colour, switching to a sulphate-free shampoo makes a noticeable difference within just a few weeks.<\/p>\n<\/p><\/div>\n<\/details>\n<details class=\"faq-details\" itemscope itemprop=\"mainEntity\" itemtype=\"https:\/\/schema.org\/Question\">\n<summary itemprop=\"name\">When can I wash my hair after colouring?<\/summary>\n<div class=\"faq-answer\" itemscope itemprop=\"acceptedAnswer\" itemtype=\"https:\/\/schema.org\/Answer\">\n<p itemprop=\"text\">It&#8217;s recommended to wait 48\u201372 hours after colouring. During this time the dye fully bonds inside the hair shaft. Washing earlier \u2014 especially with hot water \u2014 can cause some pigment to wash out before it has had a chance to set.<\/p>\n<\/p><\/div>\n<\/details>\n<details class=\"faq-details\" itemscope itemprop=\"mainEntity\" itemtype=\"https:\/\/schema.org\/Question\">\n<summary itemprop=\"name\">Can colour-treated shampoo be used on non-coloured hair?<\/summary>\n<div class=\"faq-answer\" itemscope itemprop=\"acceptedAnswer\" itemtype=\"https:\/\/schema.org\/Answer\">\n<p itemprop=\"text\">Yes \u2014 and it&#8217;s often the better choice for everyone. Mild sulphate-free shampoos are less aggressive: they don&#8217;t dry out the scalp or strip the hair&#8217;s natural lipid layer. The only exception: if you have very oily hair and wash infrequently, a gentle shampoo may not give you the clean feeling you&#8217;re used to from a sulphate formula.<\/p>\n<\/p><\/div>\n<\/details>\n<details class=\"faq-details\" itemscope itemprop=\"mainEntity\" itemtype=\"https:\/\/schema.org\/Question\">\n<summary itemprop=\"name\">Do bleached or highlighted hair need a different shampoo?<\/summary>\n<div class=\"faq-answer\" itemscope itemprop=\"acceptedAnswer\" itemtype=\"https:\/\/schema.org\/Answer\">\n<p itemprop=\"text\">Bleached hair is the most porous and the most vulnerable. A sulphate-free shampoo with collagen is a solid base, but if you&#8217;re noticing brassiness or yellow tones, add a purple or silver toning shampoo 1\u20132 times a week alongside your regular routine.<\/p>\n<\/p><\/div>\n<\/details>\n<details class=\"faq-details\" itemscope itemprop=\"mainEntity\" itemtype=\"https:\/\/schema.org\/Question\">\n<summary itemprop=\"name\">How much shampoo should I use?<\/summary>\n<div class=\"faq-answer\" itemscope itemprop=\"acceptedAnswer\" itemtype=\"https:\/\/schema.org\/Answer\">\n<p itemprop=\"text\">For medium-length hair, about the size of a coin \u2014 roughly 2\u20133 cm in diameter. Sulphate-free shampoos lather less \u2014 this is normal and doesn&#8217;t mean they clean less effectively. Don&#8217;t increase the amount for the sake of lather: it&#8217;s just unnecessary stress on the hair.<\/p>\n<\/p><\/div>\n<\/details>\n<\/section>\n<section>\n<p class=\"related-title\"><strong>Read also<\/strong><\/p>\n<div class=\"related-links\">\n      <a href=\"\/en\/blog\/heat-protection-colour-treated-hair-why-its-essential\/\">Heat protection for colour-treated hair: why it&#8217;s essential<\/a><br \/>\n      <a href=\"\/en\/blog\/7-signs-your-hair-is-dehydrated\/\">7 signs your hair needs hydration<\/a><br \/>\n      <a href=\"\/en\/blog\/jak-kolagen-a-cajovnik-v-produktech-xiaomoxuan-posiluji-a-chrani-vlasy\/\">Collagen and tea tree: how they work in synergy<\/a><br \/>\n      <a href=\"\/en\/blog\/5-common-hair-washing-mistakes\/\">5 hair-washing mistakes you&#8217;re probably making<\/a>\n    <\/div>\n<\/section>\n<\/article>\n<p><\/p>","protected":false},"excerpt":{"rendered":"<p>Shampoo is the first and most important step in caring for colour-treated hair. We explain what actually affects colour longevity&#8230;<\/p>\n","protected":false},"author":2,"featured_media":6931,"parent":6735,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"_acf_changed":false,"inline_featured_image":false,"footnotes":""},"class_list":["post-6929","page","type-page","status-publish","has-post-thumbnail","hentry"],"acf":[],"_links":{"self":[{"href":"https:\/\/xiaomoxuan.cz\/en\/wp-json\/wp\/v2\/pages\/6929","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/xiaomoxuan.cz\/en\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/xiaomoxuan.cz\/en\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/xiaomoxuan.cz\/en\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/xiaomoxuan.cz\/en\/wp-json\/wp\/v2\/comments?post=6929"}],"version-history":[{"count":6,"href":"https:\/\/xiaomoxuan.cz\/en\/wp-json\/wp\/v2\/pages\/6929\/revisions"}],"predecessor-version":[{"id":6978,"href":"https:\/\/xiaomoxuan.cz\/en\/wp-json\/wp\/v2\/pages\/6929\/revisions\/6978"}],"up":[{"embeddable":true,"href":"https:\/\/xiaomoxuan.cz\/en\/wp-json\/wp\/v2\/pages\/6735"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/xiaomoxuan.cz\/en\/wp-json\/wp\/v2\/media\/6931"}],"wp:attachment":[{"href":"https:\/\/xiaomoxuan.cz\/en\/wp-json\/wp\/v2\/media?parent=6929"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}