The traditional art of keris making

[A. G. Maisey]

Depends on construction.

It is possible to forge just the pamor from 7 different ferric materials --- or 107 if one wishes --- this then becomes pamor sanak, and you can still put in the slorok.

If you just forge the ferric materials together you get a kind of mechanical damascus, and how good it is depends on the materials and the heat treat.