Dyes & pigments

Outstanding purity

Dyes and pigments have a wide range of applications. For example, high-quality dyes and pigments are used in the pharmaceutical and cosmetics industries. The production of these materials requires efficient filter systems for essential process steps such as filtration, washing and pre-drying. Our rotary pressure filters (type RPF) or indexing belt filters (type BF) cover these requirements efficiently. Our Autopress (type AP) is also used for special applications such as products or intermediate dye products that are extremely difficult to process. Typically, a thin cake and a high level of purity are required, and our systems easily meet these requirements thanks to a variety of cake treatment options.

Excellent Pearlescent Pigments Produced with the Rotary Pressure Filter RPF

Rotary pressure filters from BHS-Sonthofen have proved effective in many applications - at Merck, they operate around the clock in the production of pearlescent pigments. Watch the video to find out how the BHS filtration solution helps cars and cosmetics to achieve a sparkling appearance. 

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Brochure "Indexing belt filter (BF)" (PDF / 2.0 MB)
Brochure "Indexing belt filter (BF)"

Product brochure for indexing belt filter (BF) as a continuously operating, horizontal vacuum filter

Size: 2.0 MB
Brochure “Rotary pressure filter (RPF)” (PDF / 2.4 MB)
Brochure “Rotary pressure filter (RPF)”

Product brochure for the rotary pressure filter (RPF)

Size: 2.4 MB

Advantages of BHS filtration technology

  • Pressure or vacuum filtration
  • High quality and purity
  • Multiple options for cake treatment
  • Pharmaceutical-grade machine design possible
  • Trained service team


  • Printer pigments
  • Intermediates & semi-finished products
  • Phthalic acid
  • Phthalocyanine
  • Phthalocyanine pigments
  • Sulfonic acid
  • Mineral pigments
  • Indigoids
  • AZO dyes
  • Pearlescent pigments
  • Silicate pigments
  • Aniline dyes
  • Anthraquinone dyes

BHS filtration technical center

Link to tests at BHS technical center
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