The seaweed mask is not made from the seeds of seaweed, but from the seeds of a plant called Pseudoacidophilus. False Sour Paste is the seed of the plant False Sour Paste in the Solanaceae family, which is an erect annual herb native to the American region. Its seeds are light brown in color, and the process of making seaweed face masks usually also includes the seeds of pseudoacidophilus after special treatment, grinding into fine particles, and then mixing with natural ingredients such as water or milk to make our common seaweed face.