http://www.potsaa.com/silver-overlay/
The metal clay is a suspension of tiny particles of metal in a clay binder, which can be used to make jewelry, beads and low scores. The beauty of metal clay is that it can be handled the same way as any pulp shape, but once learned the liaison officers are leaving the burned metal intact. Although there is a certain amount of withdrawal (between 10-15% for most versions modern), fine detail can be made, including impressions that require a casting vote in any other method of working metal.
Results for metals silver paste in objects containing almost pure silver (also known as pure silver) which is ideal for enameling. There are two popular brands available – Precious Metal Clay (also known as PMC) and Art Clay Silver (ACS). Precious Metal Clay has been developed in the early 1990s in Japan and consists of microscopic particles of pure silver (or gold powder) and a water soluble binder burns during cooking. The original formula of PMC (now called "Standard") must be cooked in an oven at a temperature of 1650F and a withdrawal rate important agenda of 30%. Two additional versions were then developed called PMC +, which can be fired at 1490F and PMC3, which can be fired at temperatures as low as 1100f. These last two versions of PMC are much lower rate of withdrawal, allowing more details purposes must be refined in design.
Art Clay Silver (ACS) has also been developed in Japan and is the consistency of the PMC +. The main difference with the ACS is that it can be launched using a flashlight or gas furnace. Because of subtle differences in components binder and the cooking time longer, ACS benefited from a considerably smaller percentage shrinkage – only 8-10%. This means that the ACS can be worked out in greater detail with no loss of definition of the good work. Art Clay Slow Dry was introduced shortly after, which is much more working time before requiring fire, allowing complex work to be molded in clay without any loss of ductility.
Art 650 and Art Clay 650 Slow Dry Clay are becoming increasingly popular because they not only have a longer working time, but can be fired at temperatures as low as 650C/1200F. This allows jewelers to incorporate glass and pure silver in the designs without fear of damaging the components. AIDA, manufacturers the ACS also introduced oil collage, a product used only on baked clay, metal or silver bleached pulp and overlay that is designed to draw designs on glass and porcelain. These two products have enabled the use of metal clay to be incorporated into a whole new range of designs and mediums, extending the potential of this product.
Clay Metal enable jewelers to work with material which is as malleable as clay plain, but produces fine (almost pure) silver jewelry complexity and exquisite beauty. When polished it has a sparkle and shine is easily comparable to throwing money and because of product development in recent years, the withdrawal is now longer a problem. The type used depends on personal preference since both types have their advantages, but incorporating metal clay in your design jewelry gives you a new way to study with good results.
About the Author:
Adam Hunter – E-commerce Marketing Manager of cooksongold.com. Cookson Precious Metals offer a choice of
jewellery making supplies
from over 10,000 products including gold and silver, tools,
silver art clay
and gold and silver sheet – gold, silver, platinum and palladium. Contacts: Adam Hunter E-commerce Marketing Manager Tel(DDI): +44 (0) 121 212 6491 E-mail:
adam.hunter@cooksongold.com
Article Source: ArticlesBase.com – Types of Silver Clay Explained – Precious Metal Clay and Art Clay
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