Yellow Square litmus paper is a set of 800 indicator strips (10 packs of 80) for quick acidity checks of liquids on a 1–14 pH scale in 1 pH steps. Dip a 5×0.5 cm strip for 1–2 seconds, then match its colour to the chart on the pack.
Specifications
| Parameter | Value |
|---|---|
| Product type | litmus (pH indicator) paper |
| Brand | Yellow Square |
| Measuring range | 1–14 pH |
| Resolution | 1 pH |
| Strips per set | 800 pcs |
| Packs per set | 10 |
| Strips per pack | 80 pcs |
| Strip size | 5×0.5 cm |
| Dip time | 1–2 seconds |
| Format | portable |
What you get
- A full acidity scale — the 1–14 pH range covers strongly acidic to strongly alkaline liquids.
- Readings in whole units — 1 pH resolution, checked against the chart on the pack.
- A fast test — the indicator end stays in the liquid for just 1–2 seconds.
- Plenty of strips — 800 in total, split into 10 packs of 80.
- Handy strip size — 5×0.5 cm, easy to dip into a small cup or test tube.
- Zero setup — no meter, power source or calibration involved.
Who it suits
Chemistry and biology teachers, lab technicians, aquarium keepers, gardeners and farmers testing soil, and food production staff. The 10-pack format also works for schools, shops and companies that buy strips in volume.
Who it does not suit
Anyone who needs pH to tenths or hundredths: the resolution is 1 pH, so the paper shows whole numbers only. That kind of precision calls for an electronic pH meter.
Uses and compatibility
Laboratory research and teaching, aquarium pH control, the food industry, gardening and farming (soil testing), and checking drinking and process water. The paper works on its own, with no extra equipment.
What's in the box
10 packs of 80 strips, 800 indicator strips in total. The colour chart for comparison is printed on the pack.
Questions and answers
How long should the strip stay in the liquid?
Only 1–2 seconds. Dip the indicator end, take the strip out and compare its colour with the chart on the pack.
Can it show pH to one decimal place?
No. The resolution is 1 pH, so you get a whole-number reading within 1–14, which is enough for routine checks.
How many tests does one set give?
One strip is one test, and the set holds 800 strips in 10 packs of 80.
Is it suitable for aquarium water?
Yes. Aquarium pH control is one of the listed uses; the water is tested the same way as any other liquid.
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