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This technique requires skill to predict how the flint will fracture, as the natural internal stresses within the stone can lead to unpredictable results. Percussion flaking was crucial for creating tools in prehistory, allowing humans to adapt flint and other materials into various functional shapes for cutting, scraping, and other uses. It's also studied today in archaeology to understand ancient technologies and human behaviors.
Independent Variables Controlled by the Knapper:
- Platform Depth: The distance from the edge where the hammer strikes the platform, or on a flake, the distance between the percussion point and the platform edge.
- Angle of the Blow: Determined by how the core is tilted, affecting the angle at which the hammer hits the platform.
- Exterior Platform Angle (EPA): The angle between the platform and the core surface from where the flake will be detached.
- Force of the Blow: Adjusted by varying the force applied and the size of the hammer.
- Force: More force results in larger flakes.
- Platform Depth: Increases both the length and thickness of flakes.
- EPA: Significantly impacts flake length; flakes get longer as the EPA approaches 90 degrees, but no flakes can be removed at exactly 90 degrees.
- Angle of the Blow: Has minimal impact on flake size.
1. Material Selection: Choose an appropriate piece of material.
2. Hammerstone Selection: Select a suitable hammerstone.
3. Comfort: Ensure you are seated comfortably.
4. Positioning: Properly position the core and aim the strike.
5. Blow Angle: Keep the angle of the strike less than 90 degrees.
6. Force Control: Manage the force of the blow effectively.