This is what happens when you shave with a brand new blade that has a manufacturing fault. About 7cm cut that hasnt stopped bleeding since this morning. This wont stop me from using safety razors. But check your blades. It was a Supermax blue diamond blade.
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I also agree with you that Supermax have quality issues lately. I had dull blades and the new pack,I got fine scratches on my face on the first blade used.