Methods and systems for quantitatively measuring photoprotection
US10801892B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 30, 2018 |
| Grant date | Oct 13, 2020 |
| Priority date | — |
| Expiry date | Aug 9, 2038 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N21/8422
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
The present disclosure relates, according to some embodiments, to a method of determining a quantitatively measured photoprotection of a photoprotective composition, the method comprising: (a) distributing the photoprotective composition in a position in between a drawdown bar and at least one substrate to produce a distributed photoprotective composition; (b) drawing down the distributed photoprotective composition to a thickness on at least one substrate to produce a drawn down sample film; (c) drying the drawn down sample film to produce a dried sample film; (d) measuring a UV absorption of the dried sample film to produce a UV absorption spectrum; (e) determining the quantitatively measured photoprotection of the photoprotective composition from the UV absorption spectrum.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.