TAPPI T 218
2011 Edition, January 1, 2011
Forming handsheets for reflectance testing of pulp (Büchner funnel procedure)
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Description / Abstract:
This practice describes the procedure using a Büchner funnel for
preparing specimen sheets for reflectance testing of bleached or
unbleached pulp whose fibers are readily dispersed in water. The
sheets are made at a pH of 6.5 ± 0.5. This practice permits the
preparation of sheets having a smooth and reproducible surface for
reflectance measurements with a minimum of washing or contamination
of the sample.