Solar Active thread is a special brand of UV embroidery thread that actually changes color in the sunlight.  An extraordinary new thread designed and tested for today's high-speed embroidery machines that actually changes color in sunlight.

 

Available in six sun activated changing colors. This new technology gives the user the opportunity to have embroidery designs change from one color to another after exposure to the sun or any UV light source. The unique color changing effect has been tested and proven to last more than 2000 times in and out of the sun (equivalent to the life of the garment). These threads will work on any embroidery machine up to 1200 rpm with any bobbin thread (poly, cotton, etc.). Note: Tension on the embroidery machine must be much looser than the set up for regular thread. UV threads are machine washable; can withstand temperatures up to 420 degrees F.