pressureflaked

Pressureflaked is an adjective describing a stone tool whose edge has been shaped by pressure flaking, a lithic technique that removes small flakes by applying steady pressure with a pointed implement rather than by percussion. This method is used to refine and sharpen edges after initial shaping by pounding or pecking.

The technique involves using a pressure flaker, such as an antler tine, bone tool, copper rod, or modern analog, placed against the interior surface just behind the desired edge. The knapper exerts gradual, controlled pressure, causing a small flake to detach and reveal a sharper, thinner edge. Repeated applications allow precise control over edge thickness, bevel, and morphology, enabling features such as serrations or finely tuned angles.

Materials typically employed include fine-grained lithic resources like obsidian, chert, flint, and jasper, though pressure flaking can be applied to various stones. The process is often integrated into other reduction steps, following percussion flaking, to produce a functional and aesthetically refined tool edge.

Uses and significance vary across archaeological and craft contexts. Pressureflaked edges are commonly found on projectile points, knives, and blades where a thin, sharp, and uniform edge is advantageous. The technique is valued for its precision and minimal material loss, but it requires considerable skill and time relative to direct percussion.

Relation to other methods: pressure flaking contrasts with percussion flaking, which removes larger flakes by striking the stone. Together, these techniques form a core toolkit for lithic reduction, enabling a range of edge geometries and tool forms.