Excerpts from the report Summary: The study evaluated the protective capability of ten commonly used 12-egg cartons at both the originating packing plant and at shipping destination. Cartons consisted of six plastic foam (F) and four molded pulp (P) designs. Two commonly used types of master containers were used for packing and shipping the egg cartons: 15-dozen baskets (wire or plastic) and 30-dozen fiberboard cases. Research took place in 7 States during each of the seasons of the year, consisted of 42 completed truck shipments, and lasted over a period of 2-1/2 years. Egg grading was done by State-licensed inspectors, and was performed in 8 large packing plants, 9 central distribution warehouses, and 11 retail supermarkets. After information on eggshell damage was collected, data were subjected to analysis of variance and Duncan's multiple range test to separate means. Statistical significance was at the 5-percent level of probability.