Pattern welded : use of two different steel with different characteristics to produce a contrast (like keris)
Laminated/forge folded : use of bloomed steel, forge folded several times to purify it. The position of the bloom, in the furnace, will not be homogeneous in terms of carbon content. Which will produce different coloration during etching. Also, several layer can be seen (like Japanese sword). Not that if you use two different forge folded steel ingot with different amount of carbon and different composition, you can make a pattern welded blade.
Wootz steel : crucible steel, made in a graphite crucible. It’s the composition + heating/cooling process which will give it the characteristics.
|