Why do I have to do a science experiment with lemon juice to know if the knife is stainless steel or carbon steel? Why is it not imprinted on the knife itself so I can verify before purchase? I just want my new knives to not rust after one use. My old knives that I have had for 14 years have not rusted at all. I had to get new ones because water was getting inside the handles of the old ones and would take forever to dry.