How much FAS is required per ton of pulp?

There is no single universal dosage.

A practical laboratory screening range may be approximately:

0.25–1.0% FAS on oven-dry pulp, depending on the furnish and target brightness.

For many applications, a trial program can start with several dosage points, for example:

Important: These values are starting points for trials, not guaranteed commercial recommendations.

The optimum dosage should be determined according to the customer's actual DIP furnish and process.