Just thought I would pass along some observations/experiences regarding the single-edge razor.
I have spent a few weeks with three SE razors. They are the 190 Kampfe/Star "Lather-Catcher", the STAR M1912 and the Ever-Ready M1914. All three razors used the GEM group buy blade ("For Industrial Use Only").
With all three I superlathered with VDH Deluxe and KMF Mint.
In summary, the following is my experience with all three SE razors:
First of all, all three of these razors "sing" when cutting whiskers. If your SE does not "sing", and assuming that you have a reasonably fresh blade loaded into your razor, you have more than likely experienced the following:
1. Your angle of attack is incorrect and you are gliding over the whiskers.
2. Your angle of attack is correct and you can't hear nor feel any cutting, than you have just experienced one of the best shaves of your life!
You know that your SE shave was really good when you applied some Italian Floid, Aqua Velva, etc. and didn't feel much of a sting at all!
What a fantastic shave!
I am sitting here in front of my eMac and typing this while now and then passing a hand over my face and admiring how close and comfortable a shave I just experienced with my STAR 1912 just a few minutes ago.