After selecting the appropriate mold, you will determine the correct orientation and position for the specimen in the block face. Place a small amount of molten paraffin within the bottom of the mold, and then move the mold with the specimen to the "cold spot" on the embedding unit. As the thin layer of paraffin begins to cool and harden, you can quickly move the specimen to the desired position. You will then slowly add molten paraffin and replace the cassette bottom atop the mold and over the specimen.