Smart Bang / band aid

This design is able to remind the wounded to replace plasters according to the water content of their wounds.
Most people always forget to replace the plasters due to the fast pace of our life. However, without replacing the plaster in time, wounds tend to rankle because of bacterial infection, which is not conducive to wound-healing.
By applying test strips to plasters, plasters can prompt that the wounded should replace plasters by changing their color strips on their surface, which could avoid many wounded people from amputation because of serious infection.