A lightweight bond paper typically used for air mail stationery, carbon copies of documents, legal documents, etc. Onionskin is made from chemical wood pulp, or 25% to 100% cotton-content. Onionskin commonly undergoes air drying for a cockle finish or calendering for a smooth finish.
The standard size of onionskin is 17 x 22, and comes in basis weights of 8 or 9-pound.