The PNR 12 measures the resistance a material provides against being pierced by a specifically shaped test body.
The USP (US Pharmacopeia) describes the consistency measurement by penetration method for microcrystalline wax, white petrolatum and carboxymethylcellulose sodium paste.
Download the full application report to see an example on how to measure white petrolatum.
Experts speculate over cause of Iberian power outages
I´m sure politicians will be thumping tables and demanding answers - while Professor Bell, as reported above, says ´wait for detailed professional...