![The truth behind Ceramic Coating Hardness - MOHS & Pencil hardness Testing - Welkom FEYNLAB Netherlands - Belgium - Germany The truth behind Ceramic Coating Hardness - MOHS & Pencil hardness Testing - Welkom FEYNLAB Netherlands - Belgium - Germany](https://image.jimcdn.com/app/cms/image/transf/dimension=4000x3000:format=png/path/sa13d26407d2d921e/image/id4570adc875ea975/version/1525703802/image.png)
The truth behind Ceramic Coating Hardness - MOHS & Pencil hardness Testing - Welkom FEYNLAB Netherlands - Belgium - Germany
Przemysław Pawełczyk on Twitter: "#Mohs #hardness scale vs #graphite #pencil hardness Wolff-Wilborn scale. 9H protections typically refer to the latter, meaning they're often inferior to what you want to protect, like Gorilla
![STAEDTLER Mars Lumograph Art Drawing Pencils, Graphite Pencils in Metal Case, Break-Resistant Bonded Lead, Grades 12B-10H, Set of 24 : Amazon.ca: Office Products STAEDTLER Mars Lumograph Art Drawing Pencils, Graphite Pencils in Metal Case, Break-Resistant Bonded Lead, Grades 12B-10H, Set of 24 : Amazon.ca: Office Products](https://m.media-amazon.com/images/I/A1Yf7901qaL._AC_SL1500_.jpg)
STAEDTLER Mars Lumograph Art Drawing Pencils, Graphite Pencils in Metal Case, Break-Resistant Bonded Lead, Grades 12B-10H, Set of 24 : Amazon.ca: Office Products
![Koh-I-Noor 1502/1 Technic Pencil Grades HB-10H (Set), Wood, Black, 15 x 3 x 1 cm : Amazon.co.uk: Stationery & Office Supplies Koh-I-Noor 1502/1 Technic Pencil Grades HB-10H (Set), Wood, Black, 15 x 3 x 1 cm : Amazon.co.uk: Stationery & Office Supplies](https://m.media-amazon.com/images/W/IMAGERENDERING_521856-T2/images/I/81ZJa+gi9dL._AC_SY550_.jpg)
Koh-I-Noor 1502/1 Technic Pencil Grades HB-10H (Set), Wood, Black, 15 x 3 x 1 cm : Amazon.co.uk: Stationery & Office Supplies
![How hard is a ceramic coating? What is 9H, 10H? Am I being fooled? – find out for yourself. | FEYNLAB How hard is a ceramic coating? What is 9H, 10H? Am I being fooled? – find out for yourself. | FEYNLAB](https://www.feynlab.com/wp-content/uploads/2019/05/Feynlab-Blog-Pencil-Hardness-Evaluation.png)