Ketchup is a non-traditional material, but the artist used it in his protest piece against fast food restaurants because of its ability to

symbolize the unhealthy and processed nature of fast food. The artist wanted to convey a message about the negative impact of fast food on our health and the environment. By using ketchup, a common condiment found in fast food establishments, the artist was able to create a striking visual representation of his protest. The red color of the ketchup also added a sense of urgency and anger to the piece, further emphasizing the message of the artwork.