For men

The geometry of a smooth shave

June 28, 2018
Did you ever wonder how the obtuse angles and vertices from that long-ago math class would impact your everyday life? Look no further than your morning shave. While blades are a critical component of a good shave, the geometry of the entire cartridge is equally important.

Actually, how a wood plane works is a good analogy for how a razor blade behaves during a shave. For the non-carpenters among us, that just means that the protrusion of the blade, and its angle to the surface, control the cutting action. So changing the geometry variables has a big impact on what kind of shave you get.

The relationship of the blades to the guard bar and cap controls the closeness of the shave and the dynamics of the cutting action itself. The more blades, the more complicated the relationship. A typical twin-blade shaving system has five interactive components:
  1. The seat is the foundation of the whole system, and contains the guard bar.
  2. A spacer comes next, to create the optimum distance between platform and blade.
  3. The leading blade sits on top of that, underneath the spacer.
  4. The trailing blade sits above that spacer.
  5. The cap rests on top of the entire package.

Got all that?

As you might imagine, the plastic cartridge that holds the blades is pretty important. We make each part of the system with strict tolerances so that the razor blades are in the optimum position, so you get a shave that’s both close and safe.

We actually developed and patented a process called insert molding, which forms the plastic around the blades in a single operation—eliminating the need for assembly and reducing cartridge variation. That means you get a more consistent and dimensionally stable razor. Cool, right?

All the variables affecting geometry can change the characteristics of a shave. The blade has to be the correct width. The blade perforations, which locate the blade in a cartridge, have to be precise. The dimensions of the plastic components, like the seat and cap, have to be exact. At Schick® we spend a lot of time thinking about process control and optimizing the factors that affect your razor’s geometry. Translation? You can be sure that you’re getting our best shave experience. Enjoy.

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