Paper is an aqueous deposit of any
vegetable fibre in sheet form!
What does that mean?
If you tear a piece of paper you will see a number of minute ‘whiskers’ sticking out from the line of the tear. These are the fibres, they are very small in size (not much more than a millimetre in length) and there are millions of them in any piece of paper.
Paper is made from cellulose – trees being the main source of cellulose fibre (or woodpulp). Besides woodpulp, paper can be made from other materials such as cotton, flax, esparto, straw, hemp, manilla and jute.
See below for images of the different fibre structures.