Immersing a knife used for cutting non-food items

Hi,

Because the requirement to immerse utensils is limited to food-utensils, one need not immerse a knife which one purchased for the sake of cutting non-food items. This is true even if that kind of knife is normally used for cutting food.

However: Should one ever use that knife to cut food, even as a one-time event, he would be obligated to immerse it first.

(Shulchan Aruch Yoreh Deah 120:8; Shach Yoreh Deah 120:17)

Have a great day,
Mordechai