Christina Wedin

Fillers in paper are an important component in the paper manufacturing process and influence the paper's properties such as density, basis weight, surface strength, and printing performance. These materials are used to adjust…

Dampening water plays a crucial role in the printing process and is an essential component to ensure that the printing of images and text is done correctly and of high quality. In printing shops, dampening water is used as part of…

Wood and cellulose are key raw materials in the bio-based industry and are utilized in the production of a wide range of products, from renewable fuels to bioplastics and bio-based chemicals. By characterizing these materials, we …

In today's society, where sustainability and circular economy are central, there is a growing interest in developing more sustainable methods for handling methanol and other by-products from pulp mills. Refining and utilizing…

Extractives, also known as resinous substances, are a group of chemical compounds that naturally occur in trees. Their main function is to protect trees against pests, diseases, and other external stresses. Despite their natural d…

When it comes to products used over an extended period or exposed to various environmental conditions, it's crucial that they retain their properties over time. Products that continue to function correctly and maintain their …

In the production of sulphate pulp, black liquor is formed as a residual product. It contains the consumed cooking chemicals and wood substances.

The amount of materials and chemicals in the white water system in paper production is important from both process optimization, resource management and economic aspects.

To develop, optimize the pulp process, testing and characterization of the pulp is important. Partly to know which properties are affected when process conditions change.

Dots and other types of microsamples can be challenging to analyze chemically due to their small size and limited material quantities. We have addressed this issue by microextracting minute samples for further analysis, such as ga…

TOC instruments that can, in addition to total organic or inorganic carbon in solutions, also measure total nitrogen. By, for example, analyzing total nitrogen in the bio - treatment's incoming and outgoing streams, you get i…

Separation of green liquor sludge from green liquor acts as the kidney of the chemical pulp processes. As the pulp processes are increasingly closed, the importance of following how and if the composition of the sludge changes to …

It is possible to measure viscosity with a temperature-controlled bath to determine the relationship between different temperatures and corresponding viscosity values. For some applications, the effect of temperature on the viscos…

In the forestry industry, metals are often present in various materials and processes. For example, metals may be used as additives in chemical treatments for wood or as catalysts in various processes. At the same time, metals can…

Stone cells, can occur in pulp containing aspen or spruce, which causes wear on process equipment. Stains and spores can cause defects in end products in cellulose products.

Process control in the cellulose industry is necessary to reduce driveability problems and to analyze carbohydrates and anions, for example oxalate, chloride, sulphite, sulphate and thiosulphate ions, can provide an increased know…

RISE can assist the process industry with the analysis of small particles or stains that may occur in these materials. This enables the monitoring and control of raw material quality and processes in a highly detailed manner. It i…

Determination of the molecular weight distribution of hemicellulose is important in the development of biorefinery products. It allows tracking of how the size of hemicellulose is affected in different process steps, providing qua…

Separating and purifying various chemical liquids, such as cooking liquors, yeast tanks, and black liquor, is crucial within both traditional forest industry processes and the field of biorefinery. These process liquids and materi…

The fluctuations in climate not only affect us humans but also have a significant impact on the properties of paper and cardboard. Following a summer with extremely variable temperatures and humidity, the handling of samples has b…

Colophony, also known as rosin, is a collection of resin acids that naturally occur in extractives from pine, spruce, and larch trees. Since pine oil is a common byproduct of the wood distillation process, colophony is often found…

Anthrachinone is a chemical compound typically occurring in the form of yellow needle-shaped crystals. It is utilized as a dispersion agent in the boiling process of sulfate pulp to enhance yield.

In the materials and process industries, the ability to accurately and efficiently identify products and components is crucial to ensuring high quality and smooth operation of the processes. RISE can handle and analyze various typ…

The chemicals coming out of the process need to be analyzed, controlled, and classified to determine the necessary actions for potential post-processing. Below are some common analyses suggested for process chemicals.

To ensure that production maintains the same or higher quality when transitioning to using new chemicals, it is important to have confidence in the new materials. Knowing that the new chemicals are as effective and reliable as the…

Proficiency testing represents a valuable method for assessing and ensuring the quality of laboratory operations. These comparisons can encompass various aspects, including instrument performance and analysis methods.

In pulp mills, it is of utmost importance to consider many different parameters to ensure both efficient operations and high quality of the produced pulp. One of the most crucial factors is the raw material used, namely wood.

Molecular weight distribution is an important parameter that provides insight into the chemical structure and properties of a given polymer or substance. This value is particularly significant in areas such as materials science, c…