| Sample (R1)-Ri first bleaching | Aq. sol. of 1.7% NaClO2 (m/v) (mL) | Aq. sol. of NaOH-GAA (buffer at pH ca. 5) (mL) | Temperature (˚C) | Time (h) | Stirring (rpm) | Suspension intial pH | Residue/filtrate after filtrations/washings with dist. water |
| SCB24Na-I | 150 | 150 | 90 - 100 | 4 | 30 | ca. 5 | ca. 7 |
| SCB24Na-II | 150 | 150 | 90 - 100 | 4 | 30 | ca. 5 | ca. 7 |
| Sample (R2)-Ri second bleaching |
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| SCB24Na-I* | 140 | 140 | 90 - 100 | 4 | 30 | ca. 5 | ca. 7 |
| SCB24Na-II | 150 | 150 | 90 - 100 | 4 | 30 | ca. 5 | ca. 7 |
| Sample (R3)-Ri third bleaching |
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| SCB24Na-I | 150 | 150 | 90 - 100 | 4 | 30 | ca. 5 | ca. 7 |
| SCB24Na-II | 125 | 125 | 90 - 100 | 4 | 30 | ca. 5 | ca. 7 |
| Sample (R4)-Ri fourth bleaching |
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| SCB24Na-I | 125 | 125 | 90 - 100 | 4 | 30 | ca. 5 | ca. 7 |
| SCB24Na-II | 125 | 125 | 90 - 100 | 4 | 30 | ca. 5 | ca. 7 |