Concept design: Reverse Printer - Micro Life

Many friends have probably already developed the good habit of double-sided printing with used A4 paper, but Korean designer Kim Su Yeon has come up with a more imaginative concept. Using laser technology, this reverse printer can remove ink from waste paper to recycle it. However, this concept currently seems quite unreliable, as the designer hasn't even explained the basic principles. It looks like as long as you dare to imagine, everyone can be a designer~~