Can be covered with one ball of gauze. Drying is produced within 10 days. Do not forget to rinse the leaves well before this procedure. You also need to remember that the ointment is prepared only in a high -quality glass dish with a closing lid. The basis of the ointment will be butter (of the highest quality, better home production). Put several laurel leaves in chopped form on the bottom of the jar, pour 1 cm in height with oil. Wait for the components to bring particles. Then sprinkle the crushed birch leaves. Wait a few hours when the layers begin to absorb, again a layer of oil and leaves. Thus, fill out the whole bank. Close tightly with a lid, pay attention to that there is not even a small gap anywhere.We put all this beauty in the oven on the minimum fire for two hours. After time.