Washing machine and method of manufacturing door thereof

A washing machine comprising:

• a cabinet defining an external appearance thereof and having an insertion port;
• a tub arranged inside the cabinet and capable of accommodating wash water;
• a drum arranged inside the tub and capable of accommodating laundry;
• and
• a door to open or close the insertion port, the door comprising a door cover disposed at a front side of the door when the door closes the insert port, a glass protruding inward of the cabinet, and a glass holder coupled to a rear side of the door cover to support the glass and including a coupling recess, wherein
• the door cover comprises:
• a first section made of a transparent material,
• a second section made of a material having a different refractive index than the transparent material, and arranged at a rear side of the first section to be visible through the first section, and
• a coupling protrusion disposed at a rear side of the second section of the door cover and inserted into the coupling recess of the glass holder, to thereby couple the door cover to the glass holder, and
• the first section comprises:
• a first area in direct contact with the second section, and
• a second area which is not in direct contact with the second section and is positioned outside the first area, and includes
• an edge portion provided to face a rear side of the door when the door closes the insertion port, and
• a coupled surface extended from the edge portion such that the glass holder comes into contact with the coupled surface when the glass holder is coupled to the door cover,
• wherein the coupled surface is inclined toward an inside of the door.