Students from Kuching University of Technology in Malaysia won the 2016 “Old Innovation†contest with recycled printer ink made from used cooking oil. According to the award-winning students, all the raw materials used to make ink for inkjet printers are natural and sustainable. Students in these petrochemical engineering departments collected used cooking oil from the cafeteria's cafeteria as the base material for ink conversion, followed by turmeric (yellow), cockatoo (red) and butterfly (blue) and regenerated The waste cooking oil is mixed together to color the ink. Because the ink production cost is extremely low, these students sell 50 ml of ink per bottle to their classmates at a price of 20 ringgit (about 4.78 US dollars), which is lower than the market price of ordinary inkjet printer ink. 70%. It is reported that in this competition, the students in this group are ahead of the other 14 groups, and they also receive 700 ringgit (about 500 US dollars) for their innovation. Source: China office supplies network SHENZHEN CHANGJIANG FURNITURE CO., LTD , https://www.findcjf.com