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A Proudly Canadian Corporation  Serving the pulp, paper, and board industry for three generations     

Dieintegrate pulp and condition fibres to enable more precise testing.

A Brief History

Pulmac Inc was incorporated in 2003 and, in 2012, became a founding shareholder in Pulmac Systems International Inc of Williston, Vermont. Pulmac Inc was responsible for all manufacturing and service until it formally broke with Pulmac Systems in May, 2015. Changing its name to QS Fibre Inc in 2016, the Montreal-based company  offers the  AutoScan for on or off-line determination of fibre, shive, and fines size distributions as well as competitive products and services for :

  • Pulmac MasterScreen, Z-Span Tester, Automated Sheet Former, Beater, and Dewatering Device.
  • Provisioning of testing services, in-mill service support, and mill studies

QS Fibre is owned and  operated by Brent Cowan, son of Wavell Cowan and grandson of inventor, industrialist and Pulmac patriarch, Eli Cowan.

W. Brent Cowan, CD MSc


QS Fibre : Committed to integrity

Atholville NB Pulp MillAtholville NB Pulp Mill



QS Fibre BeaterQS Fibre Beater







The QS Fibre Beater can play an important role in pulp sample preparation. It has a thirty-second slurry function which effectively disintegrates and slurries slush pulp samples. It also has a five-minute mode to disintegrate AND condition dry lap pulp samples. Conditioning action rehydrates cellulose fibres, causing them to swell and lose some curl and reduce kinks. This results in more precise zero-span pulp strength measurement and AutoImager fibre size classification.