Materials  
         
      Exposed, developed, photographic film
       

      Encapsulated protease enzymes
       

      Novo Nordisk Alcalase (high temp protease)
       

      Novo Nordisk Savinase (low temp protease)
       

      Enzyme-free washing powder
       

      Glass stirring rods, 2
       

      Boiling tubes, 2
       

      Water bath, set to 50oC
       

      Scissors
       

      Stopclock
       

      Balance, accurate to 0.1 g