[tom hyle]

More or less. Steel that has been welded for homogeneity, basically simply folded steel, does exhibit layers, even if intially folded up from a single piece (which is not traditionally usual, but I think is seen with swords made from springs, for instance); the fire alters the alloy at the surface of the billet, so the dividing lines can be found, and of course you will see them where there are welding flaws etc, but A/ it will often take a lot of etching, and B/ what was B? Dang, there was B......B/fine layers will often appear as a small-grained lineal fibrousness, almost similar to the inside of rattan.
Moro swords, though less-so kris sundang, are often much like this, too, with a temper line, but the welding is done, for technological and/or aesthetic reasons, for contrast/difference; to leave layers of differing alloys which still retain their individual natures/alloys/properties, and that are easily seen from an etch. Other Moro blades I've seen have inlaid edges, or occasionally panelled construction (like Turkish or medieval German(nic) swords), and some such macro-lamination (with a crosswise temper line that's often visible only in the edge steel, the rest often being unhardenable) appears usual on old kris sundang. So there are two very seperable issues here; micro-lamination (ie. folding or patterning in the steel) which can be done for homogeneity or for contrast; and macro-lamination, which is the joining of larger pieces to form a blade, usually with the idea of using their various properties in appropriate areas, but occasionally for size. Typically the macro laminated SE Asian blade is made of micro laminated pieces, but not always, of course, especially the edge (bit) which is likely more often/earlier imported industrial steel than would be whole blades.