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Science. 2010 Oct 29;330(6004):659-62. doi: 10.1126/science.1195550.
Pressure flaking has been considered to be an Upper Paleolithic innovation dating to ~20,000 years ago (20 ka). Replication experiments show that pressure flaking best explains the morphology of lithic artifacts recovered from the ~75-ka Middle Stone Age levels at Blombos Cave, South Africa. The technique was used during the final shaping of Still Bay bifacial points made on heat-treated silcrete. Application of this innovative technique allowed for a high degree of control during the detachment of individual flakes, resulting in thinner, narrower, and sharper tips on bifacial points. This technology may have been first invented and used sporadically in Africa before its later widespread adoption.
压制剥片被认为是一种旧石器时代晚期的创新，可追溯到约 20000 年前（20ka）。复制实验表明，压制剥片技术最好地解释了南非布隆伯斯洞穴中约 75ka 的中石器时代地层中回收的石器工具的形态。该技术用于在热处理硅质岩上制作的 Still Bay 双面尖状器的最后成型阶段。这种创新技术的应用允许在单个石片的分离过程中进行高度控制，从而使双面尖状器的尖端更薄、更窄、更锋利。这种技术可能首先在非洲发明并零星使用，然后才被广泛采用。
