Though the paper was invented as a medium of communication, today, the paper has been useful to humankind inexplicable fields. Whether it be schools or offices, medicals, households, building materials, or automotive. Paper has also developed its art called the Origami. The broad applications of paper still lie in writing and printing. The paper manufacturing mills started to make papers around 1690.
Types of Printing and Writing Paper –
There are a variety of printing and writing papers. Different types of papers are used as newspapers, cards, books, packaging papers, printer papers, art papers, craft papers, etc. The manufacturing process of these papers is variable from each other in many ways.
Manufacturing of writing and printing papers is a gradual process. The first step involves the making of pulp from recycled paper products. The pulp is produced in the pulping machines. Parason is a manufacturer of Pulping machines and other equipment necessary in the pulp making process.
The pulp can be produced in two ways – Mechanical or Chemical. Mechanical pulp is obtained by using machines like grinders and choppers. Whereas, the chemical pulp is obtained by using chemicals such as sulfite or sulfate. Chemical pulp is mainly used for high-quality paper products because it has higher strength properties as compared to the mechanical pulp. Mechanical pulp is less costly and often used for newsprint. For writing and printing paper, the chemical pulp is used.
Once the chemical operations on the raw material are done in the pulping machines, the material passes through washing and screening steps for removing the impurities and contaminants from the mixture. Further, the cleaning process removes the dirt, shives, and specs from the slurry. Then the slurry is passed through the rollers where the water from the slurry is removed and almost dry pulp is obtained. The pulp is then bleached in the deinking process which removes the stains and inks that are present in the pulp. This is done to avoid the shady look of the paper. Once the bleaching is done, we obtain a pure white pulp which can be now transformed into papers in the paper mills.
The shiny white pulp is formed into sheets in the paper machine. The excess water from the pulp is rolled out and the dry pulp is sent to the press section where it undergoes several steps to make it completely dry. Coatings are added to the pulp for getting a smooth and shiny surface. It is then processed to form rolls of sheets and later cut down into smaller rolls for easy transportation.
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