Professional Detailing1 min read

Contact-Angle Test Locations: Map Variation Instead of Choosing the Best Spot

A few convenient droplets can miss variation across a coated panel. Define the sampling locations before measurement and retain their positions rather than selecting only the best-looking region.

Updated · NANOLAB Knowledge

The key distinction

The location plan should match the question and avoid damaged or excluded areas only under documented rules. A map allows the reviewer to distinguish local application variation from a general product characteristic.

Practical checks

  1. Specify the measurement locations or selection method.
  2. Record each result against its location.
  3. Report relevant variation and exclusions with the summary.

Example

Illustrative example: a panel's centre gives favourable readings while edge regions differ. Reporting only the centre may answer a narrow local question, but it does not establish uniform behaviour across the whole panel.

Scope and limits

Do not use extra measurements selectively until a preferred average appears. The laboratory should determine the sampling design appropriate to the actual coating comparison.

Related guidance

Ask NANOLAB about the exact product and intended use. Use the current product documentation for formulation-specific instructions.