A Standard Test for Sharpness

How sharp is the edge? That is both the most important question a sharpener can ask, and possibly the hardest to answer. There are tests like cutting paper or shaving hair that are often used to demonstrate sharpness, and they are helpful to a point, but they lack the precision and standardization required to truly answer the question. However, a precise and standardized testing method is available. It is achieved using the PT50 Series Sharpness Testers from Edge-On-Up.

Measure and Quantify

The PT50 Series of Edge-On-Up Sharpness Testers give the ability to measure and quantify the level of sharpness of any given edge. They work by measuring the force in grams required to cut through a standardized, calibrated medium. The result is a number that can be used to compare the relative sharpness of edges.

Designed for the Home User

There are three models of PT50 Sharpness Testers. The Edge-On-Up Home Edge Tester (PT50C) Is intended for the home user or hobbyist looking for a reliable way to distinguish between a well sharpened edge and a poorly sharpened one, and everything in between.

The Home Edge Tester Features:

5 measurements-per-second processor
25 Gram Resolution
Portable Lightweight Design
3 Button Operation
25 Disposable Test Clips Included
2 AAA Batteries Included

Test Medium Included

The Home Edge Tester includes the Disposable Clip System (Test clips have not yet received full BESS certification).

The PT50C has a one year manufacturer's warranty.

A Comparison of the Edge On Up Testers and What's Included With Each

Specifications and What's Included With Each Model
Model	PT50A Industrial	PT50B Professional	PT50C Home
Resolution (Accuracy)	1 Gram	5 Gram	25 Gram
Measurement Speed	25 Per Second	10 Per Second	5 Per Second
Batteries	2 AAA Batteries Included	2 AAA Batteries Included	2 AAA Batteries Included
Test Clip Base	Included	-	Included
Test Clips	25 Included	-	25 Included
Aluminum Test Fixture	Included	Included	-
Test Media	Included	Included	-
Knife Fulcrum	Included	Included	Included

Specifications and What's Included With Each Model

Holiday Specials

DMT Double-Sided 8" Dia-Sharp Diamond Stone

Norton 3 Stone IM200 System

Deluxe Lansky Sharpening System

DMT Dia-Paste Diamond Compound

12" XL Double Sided Paddle Strop

8" Double Sided Paddle Strop

DMT Dia-Flat Lapping Plate

DMT Dia-Flat 95 Plus Lapping Plate

DMT Dia-Flat Plus Lapping Plate

DMT 8" Dia-Flat 95 Lapping Plate

DMT Dia-Flat 95 Lapping Plate

Edge-On-Up Home Edge Tester