For cultural reasons, enumerating the precise number of females has been difficult--and estimates of the percentage of females in the population range from 47.5 percent in the 1981 census to 48.3 percent in the 1987-88 Labour Force Survey.
Substrate (printing) Substrate is a term used in a converting process such as printing or coating to generally describe the base material onto which, e.g. images, will be printed. Base materials may include: plastic films or foils, release liner.
Newsprint and typing paper may be useful for practice and rough sketches. Tracing paper is used to experiment over a half-finished drawing, and to transfer a design from one sheet to another. Cartridge paper is the basic type of drawing paper sold in pads.