{"title":"pH \u0026 Litmus Test Papers","description":"\u003cp\u003epH and litmus paper are chemically treated test strips that change colour on contact with a liquid, giving an instant read on acidity or alkalinity without any meter or calibration. Litmus paper gives a simple acid or base result, while universal pH indicator paper shows a graded colour change you match against a chart for an approximate pH value.\u003c\/p\u003e\u003cp\u003eSmartLabs stocks litmus paper and pH test strips in South Africa across booklets, bottled strips, and continuous roll dispensers with a built-in colour chart, suited to schools, laboratories, and field testing. Whether you need a quick acid-base check for a classroom demonstration or repeated pH readings on water and soil samples, this range covers fast, low-cost indicator testing for any bench or field kit.\u003c\/p\u003e","products":[{"product_id":"ph-indicator-dispenser","title":"pH Indicator Dispenser","description":"\u003ch2\u003epH Indicator Dispenser\u003c\/h2\u003e\n\u003cp\u003eIndicator paper supplied in plastic dispenser containing 5 meters of 8 mm wide test strip. A colour chart is provided on the side of each dispenser.\u003c\/p\u003e\n\u003cp\u003e\u003cspan class=\"ILfuVd\"\u003e\u003cspan class=\"hgKElc\"\u003eA pH test strip is a strip of litmus paper with which you can measure the pH value of a liquid. The substance in the paper causes the paper to show a different colour at different acidities. \u003c\/span\u003e\u003c\/span\u003eThis is determined by dipping part of the paper into a solution of interest and watching the color change. The packages that pH paper comes in often includes a color-coded scale indicating the pH that something has when the paper turns a certain color. For instance, if the paper turns a dark greenish-blue, the pH may likely be around 11 to 14.\u003c\/p\u003e\n\u003cp\u003ePlease select form the available ranges pH 1 to 11 or pH 1 to 14.\u003c\/p\u003e","brand":"smartsciencelabs","offers":[{"title":"pH Indicator Dispenser pH 1 -14","offer_id":40199454032025,"sku":"CH0627A","price":113.39,"currency_code":"ZAR","in_stock":false},{"title":"pH Indicator Dispenser pH1-11","offer_id":40199454195865,"sku":"CH0627B","price":119.37,"currency_code":"ZAR","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0569\/3584\/1945\/products\/ph-indicator-dispenser-780901.png?v=1744789506"},{"product_id":"ph-indicator-test-strips-bottle-150-strips-ph-0-14","title":"pH Indicator Test Strips (Bottle) - pH 0 -14","description":"\u003ch2\u003epH Indicator Test Strips - pH 0 -14\u003c\/h2\u003e\n\u003cp\u003eThis products contains one box of 150 plastic pH test strips. Each pH strip has four pieces of pH paper that will change color after being submerged in a solution. Each piece of pH paper has its own pH range and will change color accordingly. After submersion, the strips can then be compared against the color chart on the case to determine the pH. This method allows for fast and accurate pH readings. To further the reliability of our products we randomly test each shipment we receive across multiple pHs to ensure product quality and reliability.\u003cbr\u003e \u003cbr\u003e \u003cstrong\u003eSpecification\u003c\/strong\u003e\u003cbr\u003e pH 0-14 Full Range Test Strips - Increments by 1 pH unit\u003cbr\u003e \u003cbr\u003e \u003cstrong\u003eInstruction:\u003c\/strong\u003e\u003cbr\u003e 1. Dip the strip into the solution for half second, allow all panels to get wet and then remove from the solution. The color will change almost immediately.\u003cbr\u003e 2. Match panels to the pH diagram on the box to get the pH reading, pH ranges from 0-14 \u003cbr\u003e \u003cbr\u003e \u003cstrong\u003ePacking List:\u003c\/strong\u003e\u003cbr\u003e 1 Bottle(150x ph strips)\u003c\/p\u003e","brand":"SmartLabs","offers":[{"title":"Default Title","offer_id":41706603937945,"sku":"C628-A","price":72.0,"currency_code":"ZAR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0569\/3584\/1945\/products\/ph-indicator-test-strips-bottle-ph-0-14-764477.jpg?v=1744789006"},{"product_id":"litmus-paper-red-100-pages","title":"Litmus paper - 100 pages","description":"\u003cp\u003eSlender, pocket-sized test paper strips consisting of dyed cellulose fibers. \u003cspan class=\"ILfuVd\"\u003e\u003cspan class=\"hgKElc\"\u003eThe main use of litmus is to test whether a solution is acidic or basic. Blue litmus paper turns red under acidic conditions and red litmus paper turns blue under basic or alkaline conditions, with the color change occurring over the pH range 4.5–8.3 at 25 °C (77 °F). Neutral litmus paper is purple.\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003ePackage Includes:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e100pages ( 5 books each with 20 pages) in plastic container.\u003c\/li\u003e\n\u003cli\u003eBooklet: Features small sheets bound together like a tiny notebook where you tear out individual strips as needed.\u003c\/li\u003e\n\u003cli\u003eSlender gellulose fiber dyed paper strips (not reinforced).\u003c\/li\u003e\n\u003cli\u003eSelect from:\u003c\/li\u003e\n\u003cul\u003e\n\u003cli\u003eBlue Litmus Paper: Primarily used to test for acids. It stays blue in neutral or alkaline solutions but turns red\/pink in acidic solutions below pH 4.5.\u003c\/li\u003e\n\u003cli\u003eRed Litmus Paper: Primarily used to test for bases. It stays red in neutral or acidic environments but turns blue in alkaline solutions above pH 8.3.\u003c\/li\u003e\n\u003cli\u003eNeutral (Purple) Litmus Paper: Infused with a blended dye. It serves as an all-in-one test by turning red for acids and blue for bases, making it perfect when you have no idea what the starting liquid is.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003ePlease note: \u003c\/strong\u003eThe litmus paper may not work on certain brands of shampoos and Sunlight Liquid dishwashing liquid as they are too close to a pH of 7. \u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eSunlight:\u003c\/strong\u003e The pH of Sunlight Liquid dishwashing liquid is between 5.0 and 7.0, depending on the \u003cem\u003e\u003cstrong\u003eexact formula\u003c\/strong\u003e\u003c\/em\u003e variant (such as Lemon or Lime). This means it ranges from slightly acidic to completely neutral. Thus we do not recommend using it in the demonstration as the exact pH is not known for each specific formulation and results will vary. If the formulation has a pH of 7 the Red Litmus paper will not turn blue.   \u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eLitmus Paper: Because its pH is so close to neutral (7.0) or slightly acidic, it will generally turn blue litmus paper a very faint red\/pink, or cause no major color change at all if it hits exactly 7.0. Red litmus paper will remain red.\u003c\/li\u003e\n\u003cli\u003eCabbage Juice Indicator: If you drop a diluted sample of Sunlight Liquid into purple red cabbage juice, the liquid will turn a light violet or soft purple, indicating its weak acidity\/neutrality.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eDemestos and Bleach: \u003c\/strong\u003eDomestos thick bleach test with litmus paper results in a unique chemical reaction, the paper will instantly flash blue and then turn completely white. Within seconds, the active ingredient in Domestos (sodium hypochlorite) destroys the plant-based pigments (lichens) that give litmus paper its color. It breaks down the chemical bonds of the dye, permanently bleaching both red and blue papers completely white.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eHow to see the pH before it bleaches\u003c\/strong\u003e:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eUse Universal Indicator Paper: High-quality pH strips or universal indicator paper will turn a deep violet or dark purple, which resists the bleaching effect slightly longer than basic litmus paper.\u003c\/li\u003e\n\u003cli\u003eDilute heavily: Mix 1 drop of Domestos into a large glass of water. This dilutes the bleaching power enough for the red litmus paper to turn blue and hold its color for a bit longer before fading.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eOther options for testing pH other than Litmus paper\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003epH Paper\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eHow to Read pH Paper every pack of pH paper comes with a printed color-matching chart. After dipping a strip into your liquid for a few seconds, you match its color to the chart:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eRed \/ Dark Pink (pH 1–3): Strong Acids (e.g., Battery acid, Lemon juice)\u003c\/li\u003e\n\u003cli\u003eOrange \/ Yellow (pH 4–6): Weak Acids (e.g., Vinegar, Coffee)\u003c\/li\u003e\n\u003cli\u003eGreen (pH 7): Neutral (e.g., Pure distilled water, Saliva)\u003c\/li\u003e\n\u003cli\u003eBlue (pH 8–11): Weak Bases (e.g., Baking soda)\u003c\/li\u003e\n\u003cli\u003ePurple \/ Violet (pH 12–14): Strong Bases (e.g., Domestos, Bleach, Drain cleaner)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003epH Indicator Test Strips (Bottle)\u003c\/p\u003e\n\u003cp\u003epH Test Paper\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eUniversal indicator solution is a specialized laboratory liquid mixture made from a combination of several different pH dyes. \u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe Universal Indicator Color Spectrum\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eRed \/ Deep Pink (pH 1–3): Strong Acids (e.g., Stomach acid, lemon juice)\u003c\/li\u003e\n\u003cli\u003eOrange \/ Yellow (pH 4–6): Weak Acids (e.g., Vinegar, black coffee, milk)\u003c\/li\u003e\n\u003cli\u003eGreen (pH 7): Completely Neutral (e.g., Pure distilled water)\u003c\/li\u003e\n\u003cli\u003eBlue (pH 8–10): Weak Bases (e.g., Baking soda, sea water)\u003c\/li\u003e\n\u003cli\u003ePurple \/ Indigo \/ Violet (pH 11–14): Strong Bases (e.g., Ammonia, tile cleaner, drain cleaner)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eSimple pH Test Experiment Set\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eNatural Plant Indicators (DIY)Many plants contain water-soluble pigments that naturally behave as pH indicators.\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eTurmeric Powder: An exceptional indicator specifically for detecting strong bases. It is a bright, vibrant yellow in neutral or acidic conditions but snaps to a deep dark red-brown when it touches an alkaline substance like laundry powder or soapy water.\u003c\/li\u003e\n\u003cli\u003eButterfly Pea Flower Tea: This herbal tea is naturally a deep blue color. If you add an acid (like a squeeze of lemon juice), it instantly turns bright purple or hot pink.\u003c\/li\u003e\n\u003cli\u003eRed Cabbage or Black Bean Juice: Both provide a broad-range universal indicator. Boiling them creates a dark liquid that changes from red (acid) to purple (neutral) to green\/yellow (base).\u003c\/li\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cem\u003e\u003cstrong\u003eHow to read the colors (Red Cabbage):\u003c\/strong\u003e\u003c\/em\u003e\u003c\/li\u003e\n\u003cli\u003eRed \/ Dark Pink: Strong Acid (pH 1–3) Example: Lemon juice\u003c\/li\u003e\n\u003cli\u003eLight Pink \/ Violet: Weak Acid (pH 4–6) Example: Vinegar\u003c\/li\u003e\n\u003cli\u003ePurple: Neutral (pH 7) Example: Pure water\u003c\/li\u003e\n\u003cli\u003eBlue: Weak Base (pH 8–9) Example: Toothpaste water\u003c\/li\u003e\n\u003cli\u003eGreen \/ Yellow-Green: Strong Base (pH 10–12) Example: Baking soda solution\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/ul\u003e","brand":"SmartLabs","offers":[{"title":"Litmus paper 100 pages - Red","offer_id":41706934010009,"sku":"C622D","price":55.0,"currency_code":"ZAR","in_stock":true},{"title":"Litmus paper 100 pages - Blue","offer_id":41706934239385,"sku":"C622E","price":55.0,"currency_code":"ZAR","in_stock":true},{"title":"Litmus paper - Neutral","offer_id":42581878014105,"sku":"C622F","price":59.69,"currency_code":"ZAR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0569\/3584\/1945\/products\/litmus-paper-100-pages-810162.jpg?v=1744789004"},{"product_id":"ph-test-paper-80-strips","title":"pH Test Paper - 80 Strips","description":"\u003ch2 class=\"product-title\"\u003epH Test Paper (Universal pH Paper) - 80 Strips\u003c\/h2\u003e\n\u003cp\u003e\u003cspan class=\"ILfuVd\"\u003e\u003cspan class=\"hgKElc\"\u003eA pH test strip is a strip of litmus paper with which you can measure the pH value of a liquid. The substance in the paper allows it to show a different colour at different acidities. \u003c\/span\u003e\u003c\/span\u003eThis is determined by dipping part of the paper into a solution of interest and watching the color change. The package includes a color-coded scale indicating the pH that a solution has when the paper turns a certain color. For instance, if the paper turns a dark greenish-blue, the pH is likely be around 11 to 14.\u003c\/p\u003e\n\u003cp\u003eThe test strip color change must be matched with the pH scale color chart no longer than 15 seconds after it has been submerged to ensure accurate results. Quick and easy to use it provides reliable and accurate pH readings. With distinct color PH scale for result comparisons it is appropriate for testing alkaline or acid level of any liquid. This is a great product to have in every lab and at home to measure and inspect water quality, saliva, soil, aquariums etc, as well as science education.\u003cbr\u003e \u003cbr\u003e \u003cstrong\u003eSpecification\u003c\/strong\u003e\u003cbr\u003e The scale reads from pH 1 to 14:\u003cbr\u003e 1 - 3 indicates a very acidic substance\u003cbr\u003e 4 - 6 indicates an acidic substance\u003cbr\u003e 7 indicates neutral\u003cbr\u003e 8 - 11 indicates alkalinity\u003cbr\u003e 12 - 14 indicates a very high level of alkalinity\u003cbr\u003e \u003cbr\u003e \u003cstrong\u003eInstruction:\u003c\/strong\u003e\u003c\/p\u003e\n\u003col\u003e\n\u003cli\u003eSimply press the testing strip to the object or liquid you are testing. After about a second, take the paper out, using the color chart included compare the color change of the paper to find out the acidity level of your test substance.\u003c\/li\u003e\n\u003cli\u003eThe results should be compared within 15 seconds to ensure accurate readings.\u003c\/li\u003e\n\u003cli\u003eThe strips cannot indicate the Acid or Alkali solution when it's density is lower than 0.01%.\u003c\/li\u003e\n\u003cli\u003eEnsure after you remove a strip for testing, the rest of the booklet and test strips are stored in a clean and dry place.\u003c\/li\u003e\n\u003c\/ol\u003e\n\u003cp\u003e\u003cbr\u003e \u003cstrong\u003ePacking List:\u003c\/strong\u003e\u003cbr\u003e 1 x books containing 80 strips (80 strips in total)\u003c\/p\u003e","brand":"SmartLabs","offers":[{"title":"Default Title","offer_id":41706934665369,"sku":"C629-A","price":20.0,"currency_code":"ZAR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0569\/3584\/1945\/products\/ph-test-paper-80-strips-775776.jpg?v=1744789004"},{"product_id":"ph-paper-4-5-9-0-25-range-2-colour","title":"pH Paper - Range pH 4,5 - pH 9 (0,25 Range, 2 colour)","description":"\u003cp\u003eThis product contains 100 plastic pH test strips designed for fast and accurate liquid testing.Universal pH paper strips with a 4.5–9.0 range are highly accurate tools for testing narrow, non-extreme chemical variances. Because they focus closely on the neutral zone (pH 7.0), these strips provide much higher color contrast and precision than broad 0–14 pH strips.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eHealth and Wellness\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eUrine Testing: Tracks internal acid-base balances and metabolic patterns.\u003c\/li\u003e\n\u003cli\u003eSaliva Monitoring: Measures oral cavity alkalinity to evaluate dental health.\u003c\/li\u003e\n\u003cli\u003eDiet Tracking: Assesses body fluid changes when following an alkaline diet.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eGardening and Agricultur\u003c\/strong\u003ee\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eSoil Runoff: Checks water draining from pots to prevent nutrient lockouts.\u003c\/li\u003e\n\u003cli\u003eHydroponic Reservoirs: Ensures water stays in the optimal 5.5–6.5 plant growth zone.\u003c\/li\u003e\n\u003cli\u003eCompost Teas: Monitors organic fertilizer fermentation levels before crop application.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eAquariums and Aquaculture\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eFreshwater Tanks: Keeps environments stable for fish like Guppies and Tetras.\u003c\/li\u003e\n\u003cli\u003eMarine Aquariums: Verifies that saltwater setups hover safely near 8.1–8.4.\u003c\/li\u003e\n\u003cli\u003eTap Water: Tests local tap supply safety before adding it to tanks.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eHousehold and Personal Care\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eCosmetic Formulations: Ensures homemade creams match skin's natural 5.5 pH.\u003c\/li\u003e\n\u003cli\u003eDrinking Water: Tests well or filtered water against standard neutral levels.\u003c\/li\u003e\n\u003cli\u003eSourdough Baking: Monitors lactic acid buildup during dough fermentation stages.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eSpecifications \u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eStrip Quantity: 100 strips per box.\u003c\/li\u003e\n\u003cli\u003eBase Material: High-quality, absorbent cellulose paper with chemical pH indicator dyes on rigid backing.\u003c\/li\u003e\n\u003cli\u003eIndicator Setup: 2 separate pH paper pads per strip.\u003c\/li\u003e\n\u003cli\u003ePackaging: Protective case featuring an integrated color comparison chart.\u003c\/li\u003e\n\u003cli\u003eTargeted Accuracy: Individual pads respond to distinct pH ranges.\u003c\/li\u003e\n\u003cli\u003eEasy Reading: Match pad colors directly to the case chart.\u003c\/li\u003e\n\u003cli\u003eMeasurement Range: pH 4.5 to pH 9.0.\u003c\/li\u003e\n\u003cli\u003eRange: 0.25\u003c\/li\u003e\n\u003cli\u003eTesting Speed: Rapid visual results (immediate color changes).\u003c\/li\u003e\n\u003cli\u003eProduct of China\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"SmartLabs","offers":[{"title":"Default Title","offer_id":48263464583321,"sku":"DD-NPS-4589","price":69.0,"currency_code":"ZAR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0569\/3584\/1945\/files\/ph-paper-range-ph-45-ph-9-025-range-2-colour-5072415.png?v=1782822667"},{"product_id":"test-paper-roll-0-14-ph-5m-meters","title":"pH Paper - Roll 0 to 14 PH - 5m Meters","description":"\u003cp\u003eA 0-14 pH Test Paper Roll (5 Meters) is a continuous universal indicator strip used to measure the full scale of acidity and alkalinity.Unlike pre-cut strips, a roll allows you to tear off the exact length you need, reducing waste and providing a highly cost-effective testing solution.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCommon Applications\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eIndustrial \u0026amp; Laboratory: Ideal for checking chemical mixtures, pool water, and industrial runoff.\u003c\/li\u003e\n\u003cli\u003eEducation: Widely used in school science classrooms to demonstrate the full acid-base spectrum.\u003c\/li\u003e\n\u003cli\u003eEmergency Testing: High utility for identifying unknown liquids where the pH could be completely extreme (e.g., strong battery acids or heavy household lyes).\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eSpecifications\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eMeasurement Range: pH 0.0 to 14.0 (covers highly acidic, neutral, and highly alkaline solutions).\u003c\/li\u003e\n\u003cli\u003eRoll Length: 5 meters (16.4 feet) housed inside a protective plastic dispenser.\u003c\/li\u003e\n\u003cli\u003eResolution: Reads in 1.0 pH unit intervals matched via a color chart on the dispenser.\u003c\/li\u003e\n\u003cli\u003eMaterial: High-quality, absorbent cellulose paper with chemical pH indicator dyes.\u003c\/li\u003e\n\u003cli\u003ePackaging: Protective case featuring an integrated color comparison chart.\u003c\/li\u003e\n\u003cli\u003eEasy Reading: Match colors directly to the case chart.\u003c\/li\u003e\n\u003cli\u003eRange: 1.0\u003c\/li\u003e\n\u003cli\u003eTesting Speed: Rapid visual results (immediate color changes).\u003c\/li\u003e\n\u003cli\u003eProduct of China\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"SmartLabs","offers":[{"title":"Default Title","offer_id":48263497318553,"sku":"DD-PR-014","price":55.0,"currency_code":"ZAR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0569\/3584\/1945\/files\/ph-paper-roll-0-to-14-ph-5m-meters-7779830.png?v=1782822668"}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0569\/3584\/1945\/collections\/ph-litmus-test-papers-3979090.webp?v=1782036337","url":"https:\/\/smartlabs.co.za\/collections\/ph-litmus-test-papers.oembed","provider":"SmartLabs","version":"1.0","type":"link"}