The aesthetic beauty of a patterned blade

[estcrh]

Here is another type of pattern, it is a Japanese yoroi doshi tanto, 1800s, Gassan school with "ayasugi hada" which looks like a series of undulating rolling waves. Various schools of swordsmiths in Japan were able to replicate the identifying traits of their particular school which they made by manipulating laminated steel billets in various configurations some of which are shown below. Yoroi doshi tanto are an armor piercing blade which are extremely thick at the spine, this one is .5 inches. You can see the lamination on this, it appears to have an two sides of folded steel with a hardened core which can especially be seen at the point of the blade.