Sources and origins – where paper and boards are resourced/manufactured and their geographical origin:
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China, USA, Japan – pulp, paper and cardboard
Eastern Asia – rice paper.
Density
Transparency
Texture.
The physical characteristics of each type of paper and board:
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Water removed from pulp and pulp dried
Rolls cut
Pulp spread onto a mesh screen
Trees chopped to useable logs
Paper pressed to one continuous roll
Pulping- chips mixed with water and chemicals to make soup like mixture
Logs ground to chips
Bleach added to pulp to lighten the wood fibres
Transparency: the amount of light transmitted through a material
Highly opaque paper does not allow much light to pass through, unlike translucent paper, such as tracing paper.
Transparency can be important when printing on both sides of a page, as low-opacity paper will allow the reverse side printing to show through.
Texture is the tactile quality of a material; how it feels, for example coarse, smooth, silky.
Examples are smooth wove paper for writing on and linen paper, which looks and feels like fine linen fabric with its subtle embossed texture in a crosshatch pattern.
Water-colour papers are heavily textured to absorb the water from the paint and create an illusion of depth in paintings.
Density is the compactness of a substance or material.
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Paper density= mass/volume
(kg/m3) volume
(g/cm3) mass