Differences between an Iaito and a Shinken
Been practicing for a year and just wanted to ask this out of curiosity. It might be a stupid question, but I'd be interested in how both differ from each other, beyond the fact that iaito are unsharpened and are most of the time made from something else than steel.
Are there differences in construction - i.e. from how the blade is fit into the tsuka? Can iaitos be sharpened and just become actual swords - e.g. does the zinc alloy have such different properties to steel that sharpening them is not possible or dangerous?