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Sunlight-activated color changing thread.
Indoors the thread is white. Expose it to sunlight and it instantly changes to color. Go back inside and the colors changes back to white. 3,300 yds. per cone.

White to BLUE
White to GREEN
White to MAGENTA
White to ORANGE
White to PINK
White to PURPLE
White to PEACH
White to YELLOW
(technology & images provided by SolarActive)

Use Topstitch #90/14 needle.

Price $6.95 (200 yards)   $29.95 (3200 yards)