COMPOSITION OF MATTER FEED TO A HEAD BOX

A wet laid process includes a method for making paper in which a composition containing co-refined cellulose fibers and cellulose ester fibers made into a thick stock composition in a machine chest， the thick stock is fed to a cleaning/screening zone through a device that regulates the flow rate of thick stock， the consistency of the thick stock fed to the screening/cleaning zone is reduced to form a thin stock composition; the thin stock composition is subjected to a process for cleaning the thin stock and feeding the cleaned thin stock through screens to form a cleaned and screened thin stock composition， and the cleaned and screened thin stock composition is fed to a headbox.