Executive summary
Stock preparation creates the fibre suspension that the forming process actually receives. It is a controlled manufacturing stage, not a simple mixing step.
Separate and disperse
Pulping should produce usable fibre without unnecessary damage while removing or controlling unwanted material.
Control consistency
Stable consistency supports repeatable forming. Measurement, dilution logic, agitation and transfer design all affect what reaches the vat.
Engineer drainage behaviour
Refining, fines and chemistry can improve bonding or surface, but may also slow dewatering. Decisions must balance formation, strength and cycle time.
Practical implication
Evaluate the complete system rather than one isolated input or machine. Define the requirement, identify the variables that influence it, measure the result and retain what the factory learns.