Using paints developed by Day-Glo Color Corporation, these blow molds are easily identified (and seen!) by their distinctly bright colors. Poloron Products, and later Empire, were the only blow mold manufacturers known to have used Day-Glo paint on their products beginning in the 1960s. By the 1970s, both Poloron Products and Empire no longer sold products with the vibrant paint, which was often advertised as a way to enhance their daytime appearance.
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