Keep compressed yeast can, if they crumble and mix with a small amount of flour. Then arrange them on thick paper and allow to dry. After drying, place them in a tightly sealed glass jar and put in a dark place. Before use, the yeast should be checked for germination. To do this, they need to dissolve in 1/2 Cup warm water, add a pinch of sugar, 2 tablespoons flour and stir. Leave for 15-20 minutes. If the top to appear white foam, the yeast can be used for baking.
The remaining yeast can be saved, if you put them in a glass jar, completely pour the vegetable oil and cover tightly. Refrigerate before use and to check germination.
Pressed yeast must be stored at a temperature of 0-4 degrees. Warranty period of storage at this temperature for 12 hours.
Dry yeast should be stored at temperatures not above 15 degrees. Warranty period of storage of 6 to 12 months. The higher the grade of yeast, the longer the shelf life.