high precision

Ways to measure various aspects of a sharpened blade to a relatively high precision:

• sharpness tester that takes disposable clips
  • BESS (Brubacher edge sharpness scale). This is a company-proprietary scale, created by Michael Brubacher, who's the founder of the Edge-On-Up company.
  • Edge-on-Up brand products [youtube]
• goniometers
  • from SlipaKniven     [youtube]
  • from Gritomatic     [youtube]
  • from Catrasharp     [youtube]
  • from Nippon Knives
  • jury-rigged
    • very simple