What is papermaking? What materials are used to make paper? How is raw material turned into paper pulp? What happens to paper pulp during the papermaking process?

For many decades the sulfite process was the leading process for the pulping of wood. Since 1940, however, the kraft process has taken a predominant position, and sulfite mills are no …

Kraft process, (from German kraft, “strong”), chemical method for the production of wood pulp that employs a solution of caustic soda and sodium sulfide as the liquor in which the pulpwood is …

Important improvements were subsequently made to Cai’s papermaking process by his apprentice, Zuo Bo, and the process was rapidly adopted throughout China, from which it …

The rolls of paper produced by the paper machine must still undergo a number of operations before the paper becomes useful to the consumer. These various operations are referred to as …

The most common way to impart colour to paper is to add soluble dyes or coloured pigment to the paper stock. Many so-called direct dyes with a natural affinity for cellulose fibre are highly …

Dec 10, 2025 · Before 1798, Nicholas-Louis Robert constructed the first paper-making machine. Using a moving screen belt, paper was made one sheet at a time by dipping a frame or mold …

The papermaking process begins with sending logs (1) through a barker (2), and grinding them into chips (3). The chips move through a screen (4) and are mixed with chemicals before being …

The paper making process is a fairly closed loop system, where almost all of the materials used can be recycled and reused. Tree bark and other wood waste is used in boilers at the mill to …

Calendering, process of smoothing and compressing a material (notably paper) during production by passing a single continuous sheet through a number of pairs of heated rolls.