The Matoi Ryuko cosplay costume we offered includes the chest protector but it is made of PU leather. If you want it to be more firm like a real chest plate, read this blog and learn to make one by yourself.
Key point: Curve shapes can be easily made by using polythene board, you can also use fiberboard instead.
Material: polythene board(thickness 2mm and 5mm), artificial leather(brown and dark brown), newspaper, nylon belt, snap button(2 set), belt buckle(1), gum tape, sign pen, cutter, G10 glue, glue.
01. Cut the newspaper
Put the newspaper on your chest, draw around the bulge with a sign pen. Cut it around the line you drew. Cut it to make the newspaper flat.
02. Cut the polythene board
Cut two polythene boards (2mm and 5mm each) into the same shape as the newspaper. Stick them together. Draw the cross-shaped pattern on the 2mm side, and then cut the pattern out of the 2mm board only.
03. Stick the artificial leather
Apply G10 glue on the 2mm side, stick the brown leather onto it, press when it comes to the cross-shaped pattern, cut dark brown leather into the the same cross-shaped pattern and then stick it with glue.
04. Connect the nylon belt
One belt around the chest, the other one go across the shoulder from the front to the back, use the snap buttons to fix the belt and add the belt buckle. (Note: Measure your self to check the length of the belt)
PS: This article is translated from COSMODE magazine.