in fig2 a and 2b was used in the second series 48 both series were refined at a similar refining intensity specific edge load approximately 0 31 to 0 37 watt seconds per meter fig5 shows that mc pulp 40 produced using the more open inlet refiner plates resulted in a higher and more desirable tensile index as compared to the other mc refining process 42 with the more restrictive inlet plates the difference in tensile index further increases when the pulps are refined to lower freeness levels the results suggest that a stable feeding open area is desirable when pumping thicker medium consistency pulp through a refiner fig6 is a chart showing tensile index newton n meters m per gram versus pulp freeness milliliters for two medium consistency refining processes produced in multiple stages at high and low refining intensity 50 and 52 respectively the starting pulp before mc refining is a black spruce tmp produced using high consistency refining to a freeness of 472 ml a model twinflo iiib 20 inch diameter pump through refiner was used to produce both series the high intensity series 50 was refined at 6 9 consistency in multiple stages with an average refining intensity of 0 42 watt w seconds s per meter the low intensity series 52 was refined at 7 1 consistency in multiple stages with an average refining intensity of 0 31 watt w u00b7 seconds s per meter the medium consistency refiner series produced at lower refining intensity 52 resulted in a higher development of pulp tensile index compared to the series produced at higher refining intensity 50 fig7 is a chart showing tear index newton n meters m per gram versus pulp tensile index newton n.