The feather pattern is made by forcing a blunt cutting tool through a patterned bar to create distortion in the layers. Mixing the light and dark layers and making the feather.
During the forging the blade is drawn out into a gradual taper, making a blade that is thin near the tip and retains some of its thickness where it meets the handle, this leads to a much better balanced blade.
I offer a guarantee against faulty manufacture for the lifetime of the knives. This does not cover abusive use of the knives or wear and tear. The handle materials on these knives are natural and as such, must be looked after. These knives will not respond well to being left soaking in a sink or (and it pains me to even think of it) put in a dishwasher. I would consider both of these actions as knife abuse. Use them, clean them, dry them and they will remain beautiful for years to come.