How do you test your newly sharpened knife edge?

I test mine on pacemaker patients. You'd be surprised how imperative it is to have sharp tools.
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On my knives I consider "quick in hand," I prefer being able to do smooth 'S' curves down a phone book White Page (still working on octagons but I just can't get through that 4th cut). These are the blades I want the sharpest.

Other knives, needing more vigorous edges, either straight cuts in the White Pages or feel by crossing my thumb pad a few times, which is the way I've checked sharpness since I was about five. You CAN develop a feel for it.
 
cutting paper feeling how much effort is needed and how smooth it cuts. cutting old fabric sometimes, good test on toothiness and bite And of course hair shaving( but I have had knives shave well, and not have enough bite to cut into fabric)

I like if it does all three well! Usually don't have time to do all three, so usually just paper and/or hair
 
EChoil said:
Wait.

*Taylor-not-so-Swift* Whuut....???
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Haha!! I've been doing a lot of carpentry work at a surgeon's house and he brings me supplies and empty pacemaker containers every so often.
He said he could do some damage with the PT if he had to.
 
The "slow-thru-paper" test, and the fingernail test. Then I just cut up some fruit or something..
 
Catching head hair above the skin and occasionally push cutting thread on a scale if I'm trying something new, just to see how far it can go.
 
Push cutting through phone book paper, I make sure I am not pulling the knife though, it has to cut with the same part pf the blade. Then note the resistance.

My ultimate test is to take a piece of paper. Fold 1/4 inch from the end so that it is straight up at a 90 degree angle and then push straight down with the knife edge. If it cuts before it folds, its sharp
 
onojoe said:
Push cutting through phone book paper, I make sure I am not pulling the knife though, it has to cut with the same part pf the blade. Then note the resistance.

My ultimate test is to take a piece of paper. Fold 1/4 inch from the end so that it is straight up at a 90 degree angle and then push straight down with the knife edge. If it cuts before it folds, its sharp
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Do you do this with regular paper or phone book paper?
 
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