"Raw silk: The silk thread produced by the reeling together of the baves of several cocoons. Raw silk has no twist. Poil: A silk yarn formed by twisting raw silk. The twist may be very slight or exceed 3,000 per meter. Tram: A silk yarn formed by doubling two or more raw silk threads and then twisting them slightly, generally 80 to 150 TPM. Crepe: Silk yarn made by several raw silk threads and twisting them to very high levels in the range of 2000 to 4000 TPM."