Millesimal fineness – prototype circuit boards – China printed circuit assemblies

Millesimal fineness – prototype circuit boards – China printed circuit assemblies

Millesimal fineness is a system of denoting the purity of platinum, gold and silver alloys by parts per thousand of pure metal by mass in the alloy. For instance, an alloy containing 75% gold is denoted as “750”. Many European nations use the percentage hallmark stamps (i.e. ‘585’, ‘750’, and so forth) rather than ’14K’, ’18K’, and so forth., which is employed in the United States.

It is an extension of the older carat (karat in North American spelling) program of denoting the purity of gold by fractions of 24, such as “18 carat” for an alloy with 75% (18 components per 24) pure gold by mass.

The millesimal fineness is generally rounded to a three figure quantity, especially where used as a hallmark, and the fineness could vary slightly from the conventional versions of purity.

The most frequent millesimal finenesses used for precious metals:

999 (also known as three nines fine)

995 (what most dealer would purchase your platinum at if it is one hundred% pure)

950 (the most widespread purity for platinum jewellery)

900 (also identified as one particular nine fine)

999.99 (The purest kind of Gold in the marketplace)

999 (Fine gold equivalent to 24 carat, also known as three nines fine)

990 also recognized as two nines fine

916 (equivalent to 22 carat)

833 (equivalent to 20 carat)

750 (equivalent to 18 carat)

625 (equivalent to 15 carat)

585 (equivalent to 14 carat)

417 (equivalent to 10 carat)

375 (equivalent to 9 carat)

333 (equivalent to 8 carat minimum regular for gold in Germany following 1884)

999.9 (Ultra-fine silver utilized by Royal Canadian Mint in the Canadian Silver Maple Leaf)

999 (Fine silver utilized in bullion bars, also identified as 3 nines fine)

980 (frequent standard employed in Mexico ca.1930 – 1945)

958 (equivalent to Britannia silver)

950 (equivalent to “French 1st Normal”)

925 (equivalent to Sterling silver)

900 (equivalent to “Coin silver” in the USA, also identified as one nine fine)

875 (could be located in former USSR and in Switzerland)

833 (widespread common used in continental silver especially among the Dutch, Swedish, and Germans)

830 (widespread standard utilised in older Scandinavian silver)

835 (a common predominantly used in Germany after 1884)

800 (minimum normal for silver in Germany after 1884 Egyptian silver Canadian silver circulating coinage)

750 (uncommon silver normal identified in older German, Swiss and Austro-Hungarian silver)

Gold as an investment

Silver as an investment

Anklet Belt buckle Belly chain Bracelet Brooch Chatelaine Crown Cufflink Earring lapel pin Necklace Pendant Ring Tiara Tie clip Watch (pocket)

Bench jeweler Goldsmith Jewelry designer Lapidary Watchmaker

Casting (centrifugal, lost-wax, vacuum) Enameling Engraving Filigree Metal clay Plating Polishing Repouss and chasing Soldering Stonesetting Wire wrapping

Draw plate File Hammer Mandrel Pliers

Gold Palladium Platinum Rhodium Silver

Britannia silver Colored gold Crown gold Electrum Platinum sterling Shakudo Shibuichi Sterling silver Tumbaga

Brass Bronze Copper Kuromido Pewter Stainless steel Titanium

Aventurine Agate Alexandrite Amethyst Aquamarine Carnelian Citrine Diamond Emerald Garnet Jade Jasper Malachite Lapis lazuli Moonstone Obsidian Onyx Opal Peridot Quartz Ruby Sapphire Sodalite Sunstone Tanzanite Tiger’s Eye Topaz Tourmaline

Amber Copal Coral Jet Pearl Abalone

Carat (unit) Carat (purity) Locating Millesimal fineness

Connected topics: Physique piercing Fashion Gemology Metalworking Wearable art

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(Post from China rapid prototyping blog)

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