| 摘要 |
<p>A whiteness selection device (98) that selects a plurality of differing degrees of whiteness, an economy operation selection device (99) that selects economy operation, and a control unit (97) are disposed; wherein the control unit (97), when the whiteness is selected by the whiteness selection device (98), controls at least one deinking condition from among the holding time for which a waste paper material solution (37) is held within a deinking tank (39), the deinking agent addition amount by which a deinking agent (58) is added to the waste paper material solution (37), and the amount thereof diffused to the interior of the deinking tank (39), in response to the selected whiteness, and controls in a manner such that the waste paper material solution (37) obtained in a pulper (17) is supplied to a papermaking device (4) without passing through the deinking tank (39), when the economy operation is selected by the economy operation selection device (99).</p> |
