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.
A sheet-fed press may consist of multiple print units that each print a different color of ink. Some of the parts commonly found on a sheet-fed press, especially those used for offset printing include the printing plates and plate cylinder, blanket, and impression cylinder. The sheets of paper for the sheet-fed press are typically fed into the press sheetwise or using the work-and-turn or work-and-tumble methods.