The full 2-level factorial design setup required preparation
of sausages from sausage meat prepared with 16 different combinations
of the four factors, i.e. added myoglobin (0 or 1.5 g kg1),
iron(III)sulphate hydrate (0 or 36 mg kg1), erythorbic acid (0 or
1000 mg kg1) and/or calcium carbonate (0 or 6 g kg1).