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Coating Trial Percentages: Always Show the Sample Count
A percentage conceals how much evidence it represents. Showing the count makes a result easier to assess.
Updated · NANOLAB Knowledge
Practical approach
Report the number meeting the criterion and the total evaluated, together with the criterion and test conditions.
A 100% pass rate could mean two of two samples or two hundred of two hundred. These are not equivalent bodies of evidence.
Decision limits
Do not add unwarranted certainty to small samples. State the observed result and the limits of the tested group.
Related guidance
- Measuring Colour Change in a Nano Coating Trial
- Scratch-Removal Percentages: Define the Denominator Before Quoting
- Coating Trial Data: Keep Raw Observations Separate from Scores
- Coating Trial Cleaning: Record the Amount of Cleaner Consumed
Ask NANOLAB about the exact product and intended use. Use the current product documentation for formulation-specific instructions.
Continue reading
Measuring Colour Change in a Nano Coating Trial
Plan a colour-change assessment for nano coatings with matched samples, consistent lighting and a clear distinction between visual observation and instrument data.
Scratch-Removal Percentages: Define the Denominator Before Quoting
A claim such as 90 percent correction is ambiguous unless the workshop explains which marks were counted and how the finish was inspected.
Coating Trial Data: Keep Raw Observations Separate from Scores
A score compresses observations into a category. Retaining the underlying observations allows later review when the scoring rule is questioned.