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The present work presents the results of 38 experiments of bone fragmentation and blank collection, together with 177 experiments of retouch. In the first series of experiments, the fragmentation step was executed by massive percussion using macro-lithic tools. The goal was to study the fragmentation stigmas and the traits of products and by-products. In the retouching experiments, the bone blanks were used to retouch flint and quartzite, and the goal was to study the formation and development of use traces.