Science. 1972 Feb 11;175(4022):632-4. doi: 10.1126/science.175.4022.632.
Pressure techniques were used to remove 83 blades from a preformed obsidian core weighing 820 grams, yielding 17.32 meters of acute cutting edge. The blades represented 91 percent of the original weight (2.1 centimeters of acute cutting edge per gram of original material), thus demonstrating the efficiency of the pressure-blade techniques for the production of acute cutting edges.
采用压力技术从一个重 820 克的预制黑曜石核心中取出 83 片刀片，产生了 17.32 米的锋利刀刃。这些刀片占原始重量的 91%（每克原始材料产生 2.1 厘米的锋利刀刃），这表明压力刀片技术在生产锋利刀刃方面的效率。
