Often called the bonds of Barsamin . Bonder is a substance very similar to rubber on Earth. It is produced by extracting a natural latex from the leaves and rooty tubers of Vulcard plant. The latex in the rooty tuber is extremely high in sulfur content, and if heated will form a extremely hard and brittle vulcanized rubber substance. The latex in the leaves has almost no sulfur and can't be vulcanized. Thus by combing the leaf and root latex, vulcanized rubber substances can be created with different harnesses and elasticities.