Flintstone65
Imagining solutions for imaginary problems
As far as I know the AC format started with Feather with Kai and Schick Japan following but I welcome any info suggesting otherwise.
The B-20 are intended for Proline shavette style razors rather than injectors (they don't inject). I believe some folks do put them in Personna/Schick injector magazines, I hand load them in my Schicks and PAL (and Enders Speed). There are some fitment problems in some vintage razors due to the non square corners of the B20 Prolines.
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Lots of info and discussion in this thread, but I'll admit it can be a bit confusing. Here's the synopsis:I thought the B20 was an AC blade. Does it fit regular injectors too?
- As @jmudrick pointed out, the B20 Prolines are pretty-much "injector-sized" and the B30 Prolines are the AC blades.
- There are slight physical differences in the B20's (i.e., rounded corners) compared to the Schick injector blades, and the B20's come in a similar container, but it does not have an injector key attached.
- You can (and some of us do) hand-load the B20 blades into our vintage Schicks injector razors, or you can load them into a near-empty Schick keyed-container. The hand-loading is done using a pair of pliers and carefully pushing them into the vintage Schick injector razors -- it's not as difficult or scary as it may sound. The B20s can be loaded into the Schick keyed-container, and there are threads on doing that....I've never tried it.
- As for quality, I like both blades -- the B20's feel a touch smoother to me than the Chinese Schicks, but I get double-digit shaves out of both.