pH Test Strips 100ct – Red & Blue Litmus Paper Kit
Quickly & Accurately Test Acid-Alkaline Levels Anywhere
Whether you're testing soil, water, cosmetics, fruit, or household solutions, this Red & Blue Litmus Paper pH Testing Kit gives you fast, reliable results in seconds — no complicated equipment required. Each box contains 100 test strips, giving you plenty for home, garden, classroom, or laboratory use.
Made in Mainland China.
How It Works
Litmus paper changes color based on the acidity or alkalinity of the substance being tested:
- Red litmus paper turns blue when it contacts an alkaline solution (pH > 8)
- Blue litmus paper turns red when it contacts an acidic solution (pH < 4.5)
- If the pH is between 4.5 and 8.0, neither paper will change color
Simply dip a strip into the liquid or press it against a damp surface — results appear immediately.
Key Features
- Simple to Use: No calibration, no equipment — just dip and read
- High Accuracy: Provides reliable acid-base readings for a wide range of liquids
- Portable: Compact box fits easily in a pocket, bag, or lab coat — test anywhere, indoors or outdoors
- Economical: 100 strips per box at an affordable price — ideal for labs, classrooms, and everyday use
- Wide Application: Test water, soil, cosmetics, laundry detergent, fruit juice, wine, beer, soapy water, and more
Specifications
- Material: Paper
- Box Size: ~6.6 × 3 × 1.5 cm (2.6 × 1.18 × 0.59 in)
- Strip Size: 6 × 0.9 cm (2.36 × 0.35 in)
- Quantity: 100 strips per box
- Colors Included: Red litmus & Blue litmus
Common Uses
- Garden soil and water quality testing
- School and university laboratory experiments
- Cosmetics and skincare product testing
- Food & beverage quality checks (fruit, wine, beer)
- Household cleaning product verification
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Frequently Asked Questions
Q: What types of substances can I test with this litmus paper pH kit?
A: These red and blue litmus test strips can be used to test a wide variety of liquids and semi-liquids, including soil water extracts, tap water, fruit juice, wine, beer, cosmetics, laundry detergent, soapy water, and more. They are ideal for both indoor laboratory use and outdoor field testing.
Q: How do I read the results from the litmus test strips?
A: Simply dip a strip into the substance you want to test or press it against a moist surface. If the red litmus paper turns blue, the solution is alkaline (pH above 8). If the blue litmus paper turns red, the solution is acidic (pH below 4.5). If neither strip changes color, the pH is in the neutral range of approximately 4.5–8.0.
Q: How many test strips are included in each box?
A: Each box contains 100 test strips — a combination of red and blue litmus paper strips — making it a cost-effective option for ongoing testing in laboratories, classrooms, gardens, and homes.
Q: Are these litmus strips reusable?
A: No, litmus test strips are single-use only. Once a strip has reacted with a substance and changed color, it should be discarded. The generous 100-strip count per box ensures you have plenty for extended use.
Production & Packaging Notice
To maintain high stock availability and fast shipping times, our items are sourced from multiple verified manufacturing facilities. While the core quality, materials, and product specifications remain identical, you may notice slight variations in the packaging design, manufacturing origin, or the wording of the printed instructions.