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At first I thought it was because of the salts coming in contact with the glue that caused the color change. Then I wondered if the heat from the candles inside the jars were causing the discoloration. That theory was shot down when I noticed some other projects I made that had no contact with heat had also turned white. As it turns out, over time the moisture from inside the salt crystals actually evaporates, leaving the chalky looking dry white salt. This would explain why epsom salt remains crystalized while inside its sealed package.

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7y ago
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11y ago

Epsom salt is not in any glue that I know about.

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Q: Is epsom salt used when making glue?
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