According to the present invention, provided is a color-changeable and grape-shaped plastic bag for blood donation, which can promote blood donation. The color-changeable and grape-shaped plastic bag for blood donation is formed by designing the shape of grapes on a sky-blue plastic bag. The plastic bag is made of a material for an existing plastic bag for blood donation and is colored sky-blue. The shape of grapes is formed by making a space only on a place to accommodate air like a tube and compressing a shape forming part (edge) to form a frame for the shape of grapes. When the blood of a donor is injected into the sky-blue plastic bag, the plastic bag can change from sky blue to violet by the combination of the sky-blue color of the plastic bag and the red color of the blood.COPYRIGHT KIPO 2016색이 변하는 헌혈 포도팩은 하늘색 팩에 포도 모양으로 구상하여 구성한다. 포도팩은 기존에 있던 헌혈팩 재질 으로 하되, 색만 하늘색으로 입혀 형상된다. 포도 모양은 예를 들어, 튜브처럼 공기가 들어 가야 하는 곳만 공간을 만들어 주어 모양을 내주는 곳에는(테두리) 압축을 하여 모양 틀을 잡아준다. 하늘색 팩에 혈액이 들어오게 되면, 색 조합으로 ‘하늘색+빨간색=보라색‘이 나올 수 있게 된다.
