Can the measurement distinguish a treated fibre from an untreated fibre in a mixed web?

Can the measurement distinguish a treated fibre from an untreated fibre in a mixed web?

The company publishes no measurement method, so it states nothing about what a reading can separate in a mixed web.

The polarity is a positive electric charge at rest, and it is measured as surface charge density, in nanocoulombs per square centimetre. The company publishes no measurement procedure, no instrument record and no uncertainty budget. What an instrument can and cannot separate depends on the method, and the company publishes none. NanoFlashing™ is a permanent positive polarity engineered into filter media itself. It is a physical property of the filter. The charge is measured on every production run, and the measurement can be repeated on any filter, upon request.

Source: Statement of Classification for the NanoFlashing™ Air Filter, sections 2.2 and 2.3, issued by NF Technical Products Inc.

Reviewed on 21 September 2026.