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paper types
Cost can be a big factor when it comes to selecting what stock to use within a project so can the different characteristics each stock possesses, such as texture, absorbency and opacity.
texture
Paper surface obviously affects the print outcome. Stocks can be smoothed off and polished with calendering rollers.
absorbency
opacity
The opacity of paper is when printed material can be seen through the reverse of the page. High opacity papers will not show ink through the reverse.
Levels of absorbency differ between stocks, measured by how penetrated the stock is by ink. Inks can dry quicker on more absorbent stocks but can also cause quality issues due to dot gain.