What is the soft hammer technique?
The second method was the soft-hammer, or baton, technique, based on a discovery of perhaps 500,000 years ago that hard rock (flint in particular) could be chipped by striking it with a softer material. The baton was a light “hammer,” an almost foot-long piece of bone, antler, or even wood,…
What is soft hammer percussion?
Soft hammer percussion produces flakes by striking the unfinished tool with a soft hammer, usually a piece of antler, bone, or wood. Pressure flaking produces flakes by using a flaker made of a soft material, such as antler, bone, wood, or copper to apply force by pressing rather than striking.
What is the difference between tools made with a soft hammer versus a hard hammer technique?
Hard hammer percussion, as the name implies, relies on the same principles, but provides more control over how the flake is detached. In hard hammer flaking, the core is held in one hand, and struck with a hammerstone. In soft hammer flaking, a hammer or baton of material softer that the core is used.
What type of implement is used for direct soft hammer percussion?
Soft-hammer percussion involves the use of a billet, usually made of wood, bone or antler as the percussor.
What is soft hammer made of?
Soft-faced or deadblow mallets have faces made of materials such as plastics, including nylon, natural rubber or tightly wound rawhide, or soft metals such as copper, aluminium, brass or lead. The goal of the choice of material is to prevent damage to the struck surface.
What are hard and soft hammer?
Soft-faced hammers feature heads made from a variety of materials like brass, nylon, lead, or even rolled rawhide; standard hard-faced hammers have heads made from alloy steel. Soft-face hammers are preferred for jobs that require precision or involve soft metals that should not be damaged.
What is the anvil technique?
A method of removing flakes by swinging the core against an anvil. Produces large thick flakes. Used extensively in the Clactonian toolmaking industries. Also called the block‐on‐block technique. From: anvil technique in The Concise Oxford Dictionary of Archaeology »
What was pressure flaking?
Pressure flaking, as the name implies, consists of applying pressure by means of a pointed stick or bone near the edge of a flake or blade, to detach small flakes from both sides. This method was used mostly to put the finishing touches on tools… In hand tool: Techniques for making stone tools.
What does flute pie crust mean?
Credit: Jennifer Causey. Use two hands to pinch (“flute”) the edge of the crust: push your thumb from one hand in between the thumb and index finger of the opposite. Or use one hand to pinch (“flute”) the edge of the crust between your thumb and the side of your index finger.
Why soft hammer is used?
A soft-faced hammer or mallet is a hammer designed to offer driving force without damaging surfaces. They also reduce the force transmitted back to the arm or hand of the user, by temporarily deforming more than a metal hammer would.
What is a soft hammer used for?
Soft hammers are used when flaking very brittle material such as obsidian or when greater control is needed. Soft hammers will not pass as much energy to the core and will absorb some of the force, affording greater control of the size and shape of the removed flake. Edges being worked must be ground dull prior to flake removal.
How can I reduce water hammer in a pump system?
New solutions are available that are specially designed to reduce or eliminate the potential for water hammer in a pump system, and they use an advanced starting and stopping algorithm developed exclusively for pump control applications. Soft starters can be effectively used to ramp up fans and blowers that are relied upon in HVAC applications.
What is the difference between soft hammer flaking and hard-hammer flaking?
Flakes produced by soft hammers are generally smaller and thinner than those produced by hard-hammer flaking; thus, soft-hammer flaking is often used after hard-hammer flaking in a lithic reduction sequence to do finer work.
What is the difference between hard hammer and soft hammer percussion?
It is the use of hard-hammer percussion that most often results in the formation of the typical features of conchoidal fracture on the detached flake, such as the bulb of percussion and compression rings. Soft-hammer percussion involves the use of a billet, usually made of wood, bone or antler as the percussor.