This is the name given to the way that Monomeric and Polymeric vinyl is produced. It involves mixing PVC granules, pigment and plasticisers in a mixing barrel. It is then brought up to temperature and passed through a calender. The speed, pressure and distance between the rollers determine the thickness of the film.
This is the lower cost vinyl film. It is thicker and does not stretch as much so it is not recommended for curves. It also has a much shorter life span but it is suitable for outdoor use so is perfect for temporary flat vehicle adverts.
Polymeric is vinyl that has plasticised PVC which means it is much softer and flexible. It is also more durable than monomeric and has a 100 year life span for indoor application and approximately 5 to 7 years outdoors.
This is a more expensive way to produce vinyl film as it involves dissolving resin in a solvent. The solution is then cast onto a very smooth casting paper, this must be done on a massive industrial scale to be viable. This process means cast vinyl is much thinner and it does not shrink over time giving it a much longer life span. Cast vinyl is?extremely flexible and can cover difficult recesses and curves.