Welcome to Imerys Performance Minerals

Virgin pulp - Fresh fiber

Virgin pulp Environment-friendly 'Total Deposit Control' solutions for cleaner virgin pulp, greater mill productivity and higher quality finished paper

Imerys offers bespoke talc-based Total Deposit Control (TDC) solutions for improving the quality of virgin pulp, the productivity of paper production processes and the quality of final paper products. 

Pulp cleanliness is critical for runnability in both pulp and paper production. The raw material leaving the pulping process must be as free of deposits and dirt spots as possible.

In virgin pulp production, the main cause of runnability problems is wood pitch a natural organic  component comprised of fatty acids and resin acid which is generally tacky and forms deposits in screens, filters, pipes, wires and felts leading to bad dewatering and quality issues.

At the paper mill, pitch from virgin pulp which isn't deposit free agglomerates in fabrics and dryer cylinders causing holes in the finished paper and even web breaks. 

At both stages of the papermaking process, pitch problems result in reduced quality and lower total machine efficiency which directly impacts earnings.

Imerys' Total Deposit Control bespoke talc -based solutions are environmentally friendly substitutes to chemical pitch control agents which improve productivity and the finished product and enable mills to work with closed water circuits - reducing river pollution and water consumption.

TDC can bring huge benefits

It keeps the virgin pulp and paper production process streams clean and increases mill productivity:

  • Improving pulp quality
  • Preventing deposits in the equipment 
  • Increasing machine runnability and reducing downtime
  • Reducing felt cleaning and leading to fewer felt changes 
  • Improving sludge dewatering and drainage time
  • Allowing you to work with closed water circuits, reducing water consumption and river pollution

It improves the quality of the finished paper, reducing dirt count and surface defects of finished paper.


We offer a full range technical and process support services to help you match the right mineral grade to your application requirement.

Please contact us, we will be only too happy to help

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