supply of computer stationery size: 12 inch x 12 inch x 2 part 70gsm. specifications:paper: as per is no.12766 / 1997. carbon paper quality: base paper shall be of type a to is: 9055 / 79 ( reaffirmed 2003 ) with am dt. no.1. the base paper shall be coated on the side with suitable carbon ink necessary to give the required manifold characteristics. the coating shall be smooth, uniform and free from smudginess and tendency to separate as flakes when used. mass coating shall be 6 plus / minus 1 gm / m2. manifold characteristics ( minimum no.of legible carbon copies ) 1. perforation: sprocket / round holes on both sides and free from chip. [ warranty period: 30 months after the date of delivery ]