Can an open package of dry yeast be resealed and used later?
It is possible, but the important factors are air and moisture. If you can vacuum seal the yeast then this would be ideal, otherwise a re-sealed pack should be used quickly as the cells will lose activity in the presence of air and water. Pressing a pack tightly before applying the seal is not really that effective. Use opened yeast within a week to ensure good performance. ………………………………..
