Simthread Glow in The Dark Embroidery Machine Thread (1100y 6c)

Package Including: 1 x 5 colors/kit, 550 yards/spool NOTE Please kindly put it under the natural light or lamp around 10~30 Minutes for absorbing light. It can glow in the dark after absorbing sunlight or visible light in 10~30 minutes; the longer time it absorbs light, the longer it glows. It will be Natural light, not glow as the lamp.

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