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