INTRODUCTION The above figure shows the spray-up process. It consists of fibre, chopper, mould etc... Spray-up is an open moulding , composite fabrication process where resin and reinforcement are sprayed onto a reusable mould. Working First we cut the continuous fibres by help of chopper. Then a mixture of fiber and resin along with catalyst is sprayed simultaneously onto a vertical mould. The density of deposited laminate is later increased with the help of a roller by removing the entrapped air. Multiple layers may be added to produce the desired thickness. Curing is usually at room temperature but may be accelerated by the application of a moderate amount of heat. ...