What makes Christmas ornaments glow in the dark?

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Glow-in-the-dark Christmas ornaments do so because of the coatings used on their exterior. Typically, manufacturers apply coatings such as paint, powder mixed with clear liquid, or resin, each of which derives its glowing property from various technologies.

Paint

Glow Inc. describes how glow paint is used for a variety of crafting projects similar to Christmas ornaments.

Powder

Glow powder is another coating used for such products, according to Glow Inc. This decorative material can be used to coat "just about anything," Glow Inc. says

Resin

Home crafters also use glow-in-the-dark polyester resins for such projects, according to Glow in the Dark, which includes Christmas ornaments in its crafting suggestions.

Technology

One technological process creates a glow-in-the-dark effect by allowing paints and powders to absorb and then release light over time, according to Glow Inc.

Caution

While there are is little specific information about early glow-in-the-dark Christmas ornaments, they are not believed to be dangerous, as direct contact is typically limited or nonexistent. However, some of these early products did use radium paint, which has been found to be radioactive and, in some applications, dangerous, according to MadSci Network.

Source:

Hobbyglow.com: Glow in the Dark Paint and Powder

Glowinthedark.net: Polyester Resin and Glow in the Dark Pigments Mixes

Madsci.org: What Causes Luminous Watch Dials to Glow in the Dark?

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What makes Christmas ornaments glow in the dark?

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