Patina Nakiri Knife | The "Platypus" Knife | G10 HandleIntroducing Koi Patina Knives. Designed for the professional kitchen, we have taken some of our favourite designs and reinforced them with G10 handles and forced patina finish. This improves their wear resistance, allowing the knives to take on some of the brutal challenges a commercial kitchen has in store. The Platypus Knife takes its design from the Japanese Nakiri, designed for vegetable chopping. Its flatter belly allows it to make full contact