A YouTube viewer asks:
Please tell me the significance or the difference between an “open tooth comb” and the smooth edge safety razor. Thanks. I have not heard you discuss the “open tooth comb.” I thinking about buying one.
Open tooth comb razors were originally designed to cope with thick, multi-day (or week) growth: men of the time were used to shaving once or week (or less) and the open comb would help channel the beard hair. Think of it as a grooming instrument rather than a shaving instrument. These days that is not much of an issue. However it is fair to say that open comb razors are typically more aggressive than safety bar razors, exposing more of the blade to the skin. The big exception to that is the Goodfella razor out of New Zealand (photo above)–its actually quite mild for an open comb. Hope that answers your question!