Using silica gels to dry flower is also called desiccant drying technique. Desiccants are materials that can absorb water from the air. One of the most common desiccant used to dry flowers is silica. Enough silica can absorb moist from your dried flowers.
To do it, first pour one to two inches of silica gel in a microwave-safe container. Then, place the flowers blossoms side up and cover the whole with more silica gel. Place the uncovered container in the microwave along with a cup of water to prevent excessive drying.
Heat the container in the oven for 2-5 minutes, then remove it from the oven and let it cool. Do not try to take the flowers out of the silica gel before the silica gel gets cool, because the heat can burn your hands. Clean the remains of silica gel from the petals and other parts of the flower with a soft brush.