Each pack contains 16 strips. Temperature Strips are placed on the fabric and sent through the dryer to determine the temperature on the garment surface. For black shirts, it is recommended to place the temperature strip inside the shirt. Ink deposits on black shirts are thicker than on white shirts, requiring the shirt to be in the oven longer for the ink to reach the proper cure temperature.
Peel one strip off of the card and place it on top of the garment, then send the shirt and strip into the dryer. The temperature block that turns black on the strip will show the temperature.