Quote Originally Posted by Grazor View Post
Welcome to SRP, I would suggest you learn to shave with a straight first. If you are going to retail a product, you should be able to stand by it.
The Ken Onion Blade Sharpener will not do at all, although some of the so called razors on Aliexpress would benefit from it. Ken could probably cut onions with one,,maybe...
Have a look at the honing threads here to get a better idea what you are in for.
I had to look up what that sharpener is, I wouldn't even let my beater pocket knives near that thing.

Razors will have to be hand honed on a good razor stone. There's no way around that. They don't just have to be sharp, they have to be comfortable to shave with. Accomplishing that with a naked blade is no easy task.

Cheaper blades will not be hardened properly. The steel will be soft and either unable to take a sharp enough edge to shave, or dull very fast.

If you want to retail a blade, Dovo and Thiers Issard are the two that immediately come to mind. Maybe Hart as well. But they won't be cheap, as stated before Dovo's retail price begins at $100.