To enhance the paper opacity smoothness and color mineral fillers are used. Pigments are used to provide different colors to the paper in the paper industry.

10 Chemicals Used In Paper Making Download Table

Some of the important chemicals used are 1 caustic soda sodium sulfide for the kraft process the process of conversion of wood into wood pulp consisting of almost pure cellulose fibre.

Chemicals used in making paper. Main ingredient of all paper is plant material. Dry strength additives also known as dry strengthening agents are chemicals that improve paper strength of normal or not wet condition. Paper chemicals designate a group of chemicals that are used for paper manufacturing or modify the properties of paper these chemicals can be used to alter the paper in many ways including changing its color and brightness or by increasing its strength and resistance to water.

While there are about 3000 or so different types of chemicals which can be used in papermaking in practice only about 200 individual chemicals are typically used each satisfying a specific need. The chemicals used in paper manufacture including dyes inks bleach and sizing can also be harmful to the environment when they are released into water supplies and nearby land after use. Fillers improves the brightness and whiteness of the paper and provides more pop to printing paper.

So the only new chemical getting in the system is sodium sulphate which is very inexpensive as it is a by product. What are main ingredients of paper. Pigments or coloring agents.

The industry has sometimes with government prompting cleared up a large amount of pollution and federal requirements now demand pollutionfree paper. Rosin alum or combination of other chemicals is used to make paper water resistant. These substances polymerize in the paper and result in construction of a strengthening bond.

Wet strength additive chemicals such as epichlorohydrin melamine urea formaldehyde and polyimines had to be added to the paper to enable it to retain strength when it s wet. Chemicals used for bleaching mechanical pulps selectively destroy coloring impurities but leave the lignin and cellulosic materials intact these include sodium bisulfite sodium or zinc hydrosulfite no longer used in the united states calcium or sodium hypochlorite hydrogen or sodium peroxide and the sulfur dioxide borol process a variation of the sodium hydrosulfite method. Loading or filling material such as clay caco 3 talc tio 2 etc.

To color paper soluble pigments are used. Chemicals used in pulp paper manufacturing and coating. Some special purpose paper such as coffee filter paper contain wet strength polymer so to.

Are used for higher brightness and better printability. Calcium carbonate caco3 is burned to give back calcium hydroxide ca oh 2 and co2. Typical chemicals used are as epichlorohydrin melamine urea formaldehyde and polyimines.