31 Degree Temperature Changeable Color Powder Pigment $ 6.00 Product Information Color classification: purple to blue red to yellow dark green to yellow coffee to orange red to purple black to blue brown to green Pattern: solid color Style: 25 degrees of color change / 31 degrees of color change / 35 degrees of color change Type: temperature change powder Whether the hand temperature can change color depends on the ambient temperature. If the ambient temperature (air temperature and room temperature) is very high and exceeds 31C, then 25C and 31C are already high temperature colors. At this time, the human body temperature is also relatively hot and the hand temperature is relatively high, so 35C should be selected. If the ambient temperature (air temperature and room temperature) is very low and lower than 10 , your hands can't be frozen and cold, and you can't change the color of 25thermosensitive powder, let alone higher temperature. If the ambient temperature is within 20- 25 , choose 25thermosensitive powder. If the ambient temperature is within 24- 30 , choose 31 . If the ambient temperature is within 30- 35 , choose 35 Package content Temperature change powder X1