Manufacturing method of bottle-shaped can formed of metal sheet coated with colored resin

A manufacturing method of a bottle-shaped can formed of a metal sheet coated with a colored resin coating having a forming process including forming a cylindrical can trunk by drawing or ironing the metal sheet coated with the colored resin coating, and printing a design on an outer surface of the can trunk, comprising:

• painting a predetermined section of the outer surface of the can trunk multiple times while changing colors of inks thereby collecting samples of colors resulting from mixing the colors of the inks with a ground color of the predetermined section;
• preparing a tone chart by groups of hues of the colors having a same brightness and colorfulness;
• determining a color scheme of the design with reference to the tone chart;
• and
• printing the design on the predetermined section in the determined color scheme.