Scissors University©

What You Need To Know About Scissors©

Blade Edges

Blade Edges
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convex edge blade_edited.jpg

There are only two types

of scissor blade cutting edges. 


How these edges perform can vary depending on the engineered purpose.(blunt, slice, or standard cutting methods). Neither edge is right, or wrong, only different.


Both of these edges can have blades with a variety of shapes, width, length, and in the degree that the tips are tapered.

beveled edge blade_edited.jpg

Convex Edge

State of the art, smooth cutting blade, and requires the least amount of thumb force. A must have edge for slide cutting. These edges require more skill and time to manufacture and therefore are more expensive, but worth it. Micro-serrations, a specialty edge, is sometimes available.


It is recommended, that you use a scissors service provider, that will maintain manufacturers specifications. You bought the convex edge as an original option and it should not be converted to a less precise bevel edge without your consent.


The best repair service is the one that helps you maintain your scissors  intended performance and extends its longevity. Most scissors from Europe and Asia are produced with a convex edge today.

Bevel Edge

The traditional blade design originally found on all scissors. The bevel edge cuts well, but requires more thumb force than the convex blade, 


This is a less complex scissor and requires minimum training to sharpen.


Not as adept for slide cutting. 


Serrations for holding hair are sometimes available. 


Very durable and has a medium precision capability. Cost effective and easier to manufacture, and less expensive to purchase.

Deciding the type of scissors edge is most critical in satisfying your desired end result when cutting and it is equally important to select the blade and the edge for its designed purpose. Choosing the inappropriate edge can be distorted as the scissor malfunctioning, when in actuality it was used for the wrong cutting technique. Please see the article by Ole Larsen on Testing Sharpness.


Selecting scissors should be determined on its ability to perform, ergonomics, and its purpose. Too often selecting scissors is limited to its visual attributes, versus functionality. It is the responsibility of manufacturers, distributors, and the salespeople that are presenting scissors to stylist and barbers to have the necessary knowledge to guide the haircutter in this decision-making process.


It is necessary that the information at all levels of the scissors business,

from the manufacture to the hair cutter be accurate.

Sensei Shear Systems provided  the pictures of the blades. Thank you