Charge measurements and instrument interpretation

Which measured quantity is being described as polarity: potential, charge density or something else?

The polarity is a positive electric charge at rest, and it is measured as surface charge density, in nanocoulombs per square centimetre.

The coulomb is the unit of electric charge, and the National Institute of Standards and Technology gives the quantity the coulomb measures as “electric charge, amount of electricity.” NanoFlashing™ is a permanent positive polarity engineered into filter media itself. It is a physical property of the filter. A charge is a physical property. It is not a substance or a mixture of substances. The filter is passive. It draws no power, and it has no power supply, electrode, lamp or reservoir. The NanoFlashing manufacturing process produces the charge, and the process acts on the filter by physical means.

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, 2.3, 2.4 and 3.6, issued by NF Technical Products Inc.; National Institute of Standards and Technology, Guide for the Use of the International System of Units (SI), NIST Special Publication 811 (2008 ed.), § 4.2.1, Table 3, https://nvlpubs.nist.gov/nistpubs/Legacy/SP/nistspecialpublication811e2008.pdf.

Reviewed on 21 September 2026.

Are the reported charge values traceable to calibrated instruments?

The company states no charge value and publishes no instrument record, so it publishes no traceability chain for one.

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. It names the quantity and the unit, and it states no value, no traceability chain and no data set. 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.

Is measurement uncertainty large enough to change the conclusion about charge retention?

The company publishes no uncertainty figure, so there is nothing to weigh against a conclusion.

The polarity is a positive electric charge at rest, and it is measured as surface charge density, in nanocoulombs per square centimetre. What the company states about permanence is the property itself and the NanoFlashing page's statement: “NanoFlashing™ does not fade.” NanoFlashing™ is a permanent positive polarity engineered into filter media itself. It is a physical property of the filter. The company publishes no measurement procedure, no instrument record and no uncertainty budget. 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.; C-POLAR — NanoFlashing™, https://cpolar.tech/nanoflashing/. A materials review that needs more than the company's published pages is arranged in writing, through [email protected] on the Contact page.

Reviewed on 21 September 2026.

How are readings affected by the distance between the instrument and the material?

The company publishes no measurement procedure, so it states nothing about how the distance to the material affects a reading.

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. How a reading is taken is a method, and the company publishes none. 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.

Was the instrument's measurement range appropriate for the reported signal?

The company publishes no instrument, no range and no value, so no published range can be judged against a signal.

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. The instrument, its range and its settings are not published, and no value is published against which a range could be judged. The company states no value and publishes no data set. 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.

Does sample support material contribute to the measured electrical signal?

The company publishes no measurement procedure, including how a sample is mounted, so it states nothing about what the mounting contributes.

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 a sample was mounted on, and how, is a method detail, and the company publishes none. 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.

Are both sides of a treated sheet measured?

The company publishes no measurement procedure, including which faces of a sheet are measured.

The charge is measured on every production run, and the measurement can be repeated on any filter, upon request. 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. Which faces are measured, and how many points are taken, are part of a procedure the company does not publish.

Source: Statement of Classification for the NanoFlashing™ Air Filter, sections 2.2 and 2.3, issued by NF Technical Products Inc. A materials review that needs more than the company's published pages is arranged in writing, through [email protected] on the Contact page.

Reviewed on 21 September 2026.

Are measurements mapped across a roll rather than taken only at its centre?

The company publishes no sampling plan for a roll.

The charge is measured on every production run, and the measurement can be repeated on any filter, upon request. 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. A sampling plan across a roll is part of a procedure the company does not publish, and the company publishes no roll specification; terms of that kind are agreed in writing between the parties to a supply agreement.

Source: Statement of Classification for the NanoFlashing™ Air Filter, sections 2.2 and 2.3, issued by NF Technical Products Inc.; C-POLAR — Terms of Use, section 5, https://cpolar.tech/terms/.

Reviewed on 21 September 2026.

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.

How is instrument drift detected during a measurement session?

The company publishes no measurement procedure, including any drift check.

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. Drift checks are part of a procedure, and the company publishes none. 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.

Is background electrical noise reported alongside low-level measurements?

The company states no charge value and publishes no noise figure.

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. Noise floors and the way they are reported are part of a procedure, and the company publishes none. The company states no value and publishes no data set. 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. A materials review that needs more than the company's published pages is arranged in writing, through [email protected] on the Contact page.

Reviewed on 21 September 2026.

Can results from two different instrument types be compared directly?

The company publishes no measurement method, so it states no comparison between two instrument types.

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. Comparing two instruments requires both methods, and the company publishes none. 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.

Are charge measurements normalised to area, mass or some other quantity?

The polarity is a positive electric charge at rest, and it is measured as surface charge density, in nanocoulombs per square centimetre.

The coulomb is the unit of electric charge, and the National Institute of Standards and Technology gives the quantity the coulomb measures as “electric charge, amount of electricity.” Surface charge density is charge per unit area, and nanocoulombs per square centimetre is the unit in which the company states it. The company publishes no measurement procedure, no instrument record and no uncertainty budget. The company states no value and publishes no data set. 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.; National Institute of Standards and Technology, Guide for the Use of the International System of Units (SI), NIST Special Publication 811 (2008 ed.), § 4.2.1, Table 3, https://nvlpubs.nist.gov/nistpubs/Legacy/SP/nistspecialpublication811e2008.pdf.

Reviewed on 21 September 2026.

Does normalisation use the projected area or the true fibre surface area?

The company states the unit, nanocoulombs per square centimetre, and publishes no procedure that says which area is used.

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. Which area a figure is divided by is part of a procedure, and the company publishes none. 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.

Are storage measurements made under the same environmental conditions as the initial measurement?

The environment in which a measurement is made is part of a procedure, and the company publishes none.

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. 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.

Can handling during sample preparation alter the quantity being measured?

The company publishes no sample-preparation procedure and no result on handling.

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. Sample preparation is part of a procedure, and the company publishes none. 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.

Is the uncertainty from sample-to-sample variation larger than instrument uncertainty?

The company publishes no uncertainty figure of either kind, so neither can be compared with the other.

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. The company states no value and publishes no data set. 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. A materials review that needs more than the company's published pages is arranged in writing, through [email protected] on the Contact page.

Reviewed on 21 September 2026.

What reference material is used to check measurement repeatability?

The company publishes no reference material and no repeatability check.

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. A reference material and a repeatability check are part of a procedure, and the company publishes none. 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. A materials review that needs more than the company's published pages is arranged in writing, through [email protected] on the Contact page.

Reviewed on 21 September 2026.

Can a laboratory reproduce the stated physical measurement without proprietary interpretive software?

The charge is measured on every production run, and the measurement can be repeated on any filter, upon request.

The polarity is a positive electric charge at rest, and it is measured as surface charge density, in nanocoulombs per square centimetre. The coulomb is the unit of electric charge, and the National Institute of Standards and Technology gives the quantity the coulomb measures as “electric charge, amount of electricity.” That is a physical quantity in a published unit, and the company publishes no software and no interpretive step. The company publishes no measurement procedure, no instrument record and no uncertainty budget.

The company states no value, so a laboratory that measures a filter is measuring it, not reproducing a published figure.

Source: Statement of Classification for the NanoFlashing™ Air Filter, sections 2.2 and 2.3, issued by NF Technical Products Inc.; National Institute of Standards and Technology, Guide for the Use of the International System of Units (SI), NIST Special Publication 811 (2008 ed.), § 4.2.1, Table 3, https://nvlpubs.nist.gov/nistpubs/Legacy/SP/nistspecialpublication811e2008.pdf. A materials review that needs more than the company's published pages is arranged in writing, through [email protected] on the Contact page.

Reviewed on 21 September 2026.

Does a pass in a charge test predict a pass in the claimed functional test?

A published result belongs to the article that was tested, under the conditions named in the report that recorded it.

A charge measurement and a filtration or destruction test are different tests of different things, and the company does not present one as the other. A capture standard is not a destruction standard: ASHRAE 52.2 and ISO 16890 measure what a filter takes out of the air, and they say nothing about what happens to what is captured. The Terms of Use state: “A reported result describes only what the identified test found.”

What the company states about the mechanism is that the filter captures airborne particles mechanically and by electrostatic attraction, and that it is intended to destroy the viruses, bacteria and fungal spores it captures, on direct contact with the positive electric charge, by physical means, and only while the organism is captured by the positive electric charge.

Source: Statement of Classification for the NanoFlashing™ Air Filter, sections 2.5 and 2.6, issued by NF Technical Products Inc.; C-POLAR — Terms of Use, section 3, https://cpolar.tech/terms/; C-POLAR — Validation, https://cpolar.tech/validation/.

Reviewed on 21 September 2026.

Is there a recognized standard written specifically for a “destroys on contact” claim on a solid article, separate from filtration-efficiency standards?

The company names no single standard for a claim of destruction on contact; each contact test it cites is reported under its own standard, on a named medium, against an untreated control.

The filter is intended to destroy the viruses, bacteria and fungal spores it captures. It destroys them on direct contact with the positive electric charge, by physical means, and only while the organism is captured by the positive electric charge. Guangdong Detection Center of Microbiology, Report 2020FM20686R01E, 13 August 2020, tested a nonwoven filter medium against influenza A virus (H3N2) under ISO 18184:2014. Textile Testing Institute – Brno (TZÚ), Test Report AZL 26/0757-02, 3 July 2026, a laboratory accredited to ISO/IEC 17025, tested a MERV 15A filter medium under ISO 20743 and ISO 18184. Instituto Valenciano de Microbiología, Report D/26/B0483, 6 August 2026, tested a VOLZ PROsyntex PLUS PM1 70 filter medium against Aspergillus brasiliensis and Aspergillus niger under ISO 13629-2:2014. Each is a contact test on the medium against an untreated control; it is not an airborne result and not a result for a finished filter in a building. The Viruses page shows airborne virus at 1.3 m/s airflow, NanoFlashing™ beside a control, and states: “NanoFlashing™ captures the virus, and destroys it.” The Mold page shows airborne mold spores at 1.6 m/s airflow, NanoFlashing™ beside a control, and states: “NanoFlashing™ captures the mold, and destroys it.” The Mold page also states that researchers at Massachusetts General Hospital and Harvard Medical School, in a study with funding from the U.S. National Institutes of Health, tested NanoFlashing™ with more than 100 million live, dry spores driven in by fast-moving air. ASHRAE 52.2 and ISO 16890, the standards named for the Validation page's air-filtration ratings, measure what a filter takes out of the air, and they say nothing about what happens to what is captured.

Source: Statement of Classification for the NanoFlashing™ Air Filter, section 2.6, issued by NF Technical Products Inc.; Guangdong Detection Center of Microbiology, Report 2020FM20686R01E, 13 August 2020; Textile Testing Institute – Brno (TZÚ), Test Report AZL 26/0757-02, 3 July 2026; Instituto Valenciano de Microbiología, Report D/26/B0483, 6 August 2026; C-POLAR — Validation, https://cpolar.tech/validation/; C-POLAR — Viruses, https://cpolar.tech/contaminants/viruses/; C-POLAR — Mold, https://cpolar.tech/contaminants/mold/. A copy may be made available on our review of the request.

Reviewed on 21 September 2026.