Method for manufacturing stripe-patterned metal plate

A method for manufacturing a stripe-patterned metal plate comprising the steps of:

• placing plural kinds of metal sheet blanks having different colors on top of one another to provide a layer structure of said sheet blanks in an alternate order or in a predetermined order of arrangement;
• bonding the respective metal sheet blanks to each other directly and metallurigically in a solid state to provide a layer-structured plate;
• cutting said layer-structured plate in a direction along a face extending at a predetermined angle to a layer face thereof to provide at least one thin metal plate intermediate;
• inserting said metal plate intermediate into an elongated hole of a rectangular cross-section formed longitudinally through an elongated solid package of metal, said metal plate intermediate being substantially equal in cross-section to said hole in said package, said package having substantially the same thermal deformation properties as said layer-structured plate;
• and
• hot rolling said package into a predetermined length with its width remaining substantially unchanged so that said metal plate intermediate is simultaneously extended at a predetermined reduction rate with its width remaining substantially unchanged, the cut fact of said metal plate intermediate being disposed in a horizontal direction.