Paper thickness
Paper starch is modified and native starch that is used in paper manufacture to treat the paper surface, so-called sizing or impregnation , and to strengthen it. Due to the polymerisation of the gluten it contains, it seals the surface and thus improves the properties of the paper so that it can be written on or printed on with aqueous or alcoholic inks. The effect is based on the water repellency of the paper, which is hydrophilic in its normal state .
In the unsized state, water-based and low-viscosity writing materials such as ink or Indian ink would run, and the capillarity of the paper would hinder a clean typeface, as is the case with unsized products such as toilet paper or kitchen paper . Similar effects can also be achieved by using modified cellulose (for example carboxymethyl cellulose ) or polyvinyl alcohol .
For the production of paper starch , potato starch , corn starch and wheat starch are mainly used, in smaller quantities also pea starch , rice starch and cassava starch .
Web links
- Papermakers starch (English)