Further properties of mixture designs for five components in orthogonal blocks

Orthogonally blocked experimental designs for mixtures of five ingredients, formed from Latin squares, were previously discussed by Prescott et al. Here, we extend this development by studying the properties of three classes of possible designs, with recommendations on their practical application. Restrictions on the design classes are explored and D-optimal (within the classes) versions are identified. Remarks on general D-optimality conclude the paper.