Table 3.
The 27–4 design used.
| Pattern | Run | Pulp Density % | Surface Area | Ferric Chloride | Carbon Dioxide | Air | 9 K Medium | Strain |
| ----+++ | 1 | 10 | Low | No added | No added | Added | Added | T18 |
| --++--+ | 2 | 10 | Low | Added | Added | No added | No added | T18 |
| -+-+-+- | 3 | 10 | High | No added | Added | No added | Added | T1 |
| -++-+-- | 4 | 10 | High | Added | No added | Added | No added | T1 |
| +--++-- | 5 | 20 | Low | No added | Added | Added | No added | T1 |
| +-+--+- | 6 | 20 | Low | Added | No added | No added | Added | T1 |
| ++----+ | 7 | 20 | High | No added | No added | No added | No added | T18 |
| +++++++ | 8 | 20 | High | Added | Added | Added | Added | T18 |