A method for Controlling the claim number process of Whitening Treatment with Ozone, until a desired level of queamiento blan -,Comprising: (a) add Ozone to supply a desired amount of the paste; (b) Passing in and out of a Pulp Bleaching reactor; and (c) adjust the feed amount of OzOno in response to measure a property of the paste, to the value necessary to obtain a desired degree of whitening. Figure 1
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