Originally Posted by dcarch
I have heard that theory many times also.
I am not sure in fact you have to use that much more force with a not-as -sharp knife to cut. The way you hold the food (correctly) when you chop/slice, the blade really cannot cut into your fingers, dull knife or sharp knife. Carelessness and improper knife skills, IMHO are the main causes for accidents with a knife.
I am not sure for non-organ cuts, clean cuts or jagged cut will make that much difference in healing time. I think there is a possibility that a much deeper cut with a sharp knife will take long to heal than with a dull kinfe.
My point is, if you tend to be careless, with minimum knife skills, get distracted easily, DON'T use a razor sharp knife, use a not-too-dull knife instead.
I have to disagree totally. MaryB's doctor confirms that a cut from a ragged edged blade does not heal as well (and from experience I can say as quickly).
Further there are plenty of knife skills where the blade is facing your hand or finger ie. Peeling potatoes with a paring knife is a really common example wherein the knife is drawn toward the thumb, there are many more boutique and asian cuts that seem extremely unsafe and would be even moreso with a dull knife.
Try this experiment: slice half an onion with your sharpest, thinnest knife. Then grab your beater and draw it once at 90 degrees on a steel. Slice the other half and tell me which knife required more downward force. I don't think anyone can really refute a dull knife cuts solely by way of pressure, whereas a nice sharp knife glides through even a carrot like butter.
What's more, a nice sharp knife and especially a quality japanese one, requires less pressure overall to achieve most jobs, this of course being due to a number of factors many of you are more familiar with than I. But I can attest to it first hand, you shouldn't be getting a deep cut with a japanese knife if it is well maintained, as you should be applying such slight pressure that any slight contact with your hand would be immediately noted.
Although in maybe 7/10 situations good technique and form will make cutting yourself a non-issue there are from time to time things that go wrong. I don't always use a bear claw grip- even when it's practical to. I have done stupid things with knives. The only instance where having a dull knife is going to save you is in dropping it (ie. On your foot), however this can occur any time and so it is impractical to always work with a dulled blade.