Table 1. Min, Max, and Mean Size before and after Filtration of NBs with Different Additives^a.

	before			after
	min	max	mean (nm)	min	max	mean (nm)
flexible NB	125	645	310 ± 10	105	375	213 ± 5
intermediate NB	135	875	301 ± 9	105	345	176 ± 3
stiff NB	185	765	318 ± 11	105	325	178 ± 5

^aThe size distributions are shown in Figure 3. In each case, the standard deviation is for the measured mean.