Roseart v. Crayola: the Sun Test

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Photo credit: Katiedidit

Reddit user Katiedidit was making some art by melting crayons on a canvas in the hot Texas sun. She had a couple of brands on hand and decided to try each on a canvas. Surprisingly, the Roseart barely melted, making you wonder... What's in those things if not paraffin?

Link via Geekologie

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Thanks to a science fair project this spring I can attest that Crayola uses a paraffin base BUT adds other materials that affect the melting and burning qualities of their crayons. I don't know if those are the primary effects or if the additives are included for other purposes.
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Roseart uses soy instead of paraffin. Soy is great for long burning candles but you need a soft wax with good strong color dyes to have a good crayon, IMO.
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