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Weight lifting chalk is magnesium carbonate. Alum is hydrated potassium aluminium sulfate (potassium alum), KAl(SO4)2·12H2O. Probably much more astringent and grippier.

I guess that is the same deal as power lifters dusting their hands in that white powder before they hoist 500 lbs over the head. Still very masculine, not just quite as obvious a display of raw male...

Excellent! A way to get both in at the same time. I haven't tried pre-shave alum block yet. Only used it for a couple of days.

I wonder if using it pre-shave will make you less prone to small...

I use mine just like pds. A cold water rinse and a quick rub with the block when the skin is still moist but not dripping wet,followed by some after shave lotion. I love the way it makes the skin...

A recent convert to straight shaving I only discovered the joy of an alum block post-shave a few days ago. I am impressed by the nice tight/smooth feeling it gives my face. The fact that it was only...