A razor strop is a flexible strip of leather or canvas used to straighten and polish the blade of a straight razor, a knife, or a woodworking tool like a chisel. Unlike honing or sharpening a blade, in which a whetstone removes metal bent out of alignment from the blade's edge, stropping the blade re-aligns the indentations without removing any material.
The strop may be a hanging strop or a hand-held paddle. Various abrasive compounds may be applied to the strop to aid in polishing the blade while stropping to obtain a mirror-like finish. The properties of the compound applied will alter the polishing result. Jeweller's rouge is a very fine abrasive compound. The green Chromium(III) oxide compound is most often used as an abrasive compound. Sprays containing diamond particles are another option.
Stropping is primarily done with straight razors, used for shaving, as these are the thinnest blades in everyday use, and require stropping at each use, due to the thinness of the blade. Kitchen knives are instead straightened on a honing steel, which is coarser. Any blade may, in principle, be stropped to polish it.
The original focus of Horween Leather Company was the production of razor strops. However, with the advent of the safety razor in 1912, the need for razor strops waned, and the company shifted its focus to other products.
Two points are key to stropping:
- Draw the blade spine-first along the strop. By contrast, honing is done edge-first.
- Rotate the blade along the spine, so the edge moves away from the strop and faces you, and the spine rests on the strop. This preserves the edge – if the blade is rotated on the edge (facing away from you), this will roll the blade, defeating the purpose of stropping.
- "Horween Leather Co". Mas Context. January 1, 1920. Retrieved March 27, 2013.
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