Credit System Claims against the Fibre Actually inside the Box
Paperboard credit systems balance financial ledgers rather than physical fibers, requiring buyers to separate administrative certificates from batch fiber testing.
Yield Loss Calculation
Material Balance
Quantitative assessment of the mass of raw fiber or paperboard lost as waste during the various stages of the printing or converting process. Performing a yield loss calculation allows converter plants to measure the efficiency of their production lines and identify sources of material waste. This calculation takes into account trim waste, set-up waste, and defective sheets that are rejected during the run.
It provides a baseline for evaluating process improvements and calculating the true cost of the finished product.
Efficiency Metrics
Process engineers compare the weight of the raw board sheets fed into the press against the weight of the finished, shipped cartons. Executing a yield loss calculation helps identify whether the waste is occurring during the initial printing pass, the die-cutting stage, or the folding and gluing operations. If the trim waste is higher than expected, it may indicate that the layout of the carton blanks on the sheet is not optimized.
Continuous monitoring of these losses helps the plant reduce its overall material footprint.
Cost Management
Minimizing material waste is a key driver for improving the profitability of packaging converters. Using a yield loss calculation provides the necessary data to optimize sheet layouts and process parameters. This reduces raw material expenses.