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About SLAG

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    Junior Member

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  • Gender
  • Location
    St. Louis, MO


  • Location
    Montreal, Quebec, Canada
  • Interests
    almost everything
  • Occupation
    Patent lawyer & reg. agent. (Cda. & U.S.A.)

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6,546 profile views
  1. Bronze knife casting

    Suggestion, Google an occupational disease called berylliosis and check out the gory details. Nasty stuff. SLAG.
  2. Is it worth it?

    Glenn, Good point. I now dumpster dive using two chain mail gloves. It protects against cuts, abrasions, and needle stick. These gloves are often used by wood carvers, & I am certain other hobbyists. Indeed, certain industry employees use them to. They were first developed for the ladies that fillet fish in processing plants. They are blindingly fast and cuts do happen occasionally. Hence the use of those gloves. I am certain that they are available from numerous sources (vendors). I got mine from a woodworkers supply company. They are not too expensive. And our hands and health (no aids), are worth it. Cheers everybody, SLAG.
  3. how to determine the size of a burner?

    T, P., There is no sulfur component from many commercial iron minerals (ores). (hematite, (Fe2O3), and Magnetite (Fe3O4) I was referring to the metallic sulfide ores of copper, nickel, zinc etc. which are usually found as massive sulfide deposits. Those sulfide ores were roasted to drive off the sulfur mostly as sulfur dioxide gas. That roasting produced metal oxide compounds. The metallic oxide ore was then heated to convert the oxide to metal. Often the carbon monoxide generated by the burning coke or coal, reduced the oxide to metal in that smelting process. In other words, the oxides were converted to carbon dioxide leaving the molten metal behind. Most of the non ferrous metals are mined from massive sulfide ore deposits. But you already know that. I was not clear enough in my last post. Sorry about that. I remember walking about the dozens of square miles around Sudbury Ontario where nickel ore, (Pentlandite, (Fe Ni 9)S8, Chalcopyrite (Cu Fe S2), and Pyrrhotite (FexS2) was roasted in the open. That practice was used for decades. Those sulfur containing ores are also commercially important sources for iron production. The land turned into a treeless moonscape of black rock. (the moon bound astronauts trained there!). They are still mining in the Sudbury basin after well more than 120 years. Cooking over a smelter is an idea I never thought of. Great idea. Magnetic iron ore, magnetite (Fe3O4) is commonly found in the heavy black sands in streams. scale in the smithy, it is magnetic iron oxide. Collect enough of it and it can be smelted into iron. Hopefully I have now cleared up the confusion. Regards, SLAG.
  4. how to determine the size of a burner?

    Surely you jest. Smelting produces copious amounts of sulfur dioxide. YUM. Then again, you just might love it. But your neighbors will assuredly not. Do I detect a fire department visit in your near future? SLAG. Just kidding.
  5. how to determine the size of a burner?

    M. Al. The area that produced copper in Israel, was located in the Timna valley. Copper has been mined there as early as the fifth or sixth millennia before the Christian era. (BCE) And 10,000 mines have excavated there You are right that it is now a national park. The ore found there is in the usual copper sulfur form. (e.g. Malachite, Bornite, Chalcocite, etc. etc.). That ore requires roasting to convert the copper sulfides, sulfates and other salts to copper oxides and then smelting them to produce pure copper. It is simpler to buy copper and melt it for casting your desired products. Mr. I. D. bronze is very rarely found in a natural state. Most bronze was made from copper and tin that was found in very few places. There were some tin deposits in a few places in Iran and Afghanistan. The major source was mined in Cornwall England. The major source for tin is in Malaysia, in the form of stream tin. (Cassiterite (SnO2, in placer form). But that source of tin is relatively recent. Some deposits of copper zinc (brass) are more commonly found. But copper was once often treated with calamine ore to produce brass. SLAG.
  6. Introduction to Knifemaking

    Praise the Lord. I acquired the book on the ground floor. I'm amazed how much it has appreciated in value and so fast. SLAG. P.S. It's a great book.
  7. The critical eye towards forging.

    Marc1, I think you are onto something. I have come to the understanding that confrontation does not win friends. If we attack, they defend. (that, of course, is my own personal observation) Regards, SLAG.
  8. Looking for information on maille

    R.D., For a magnifying system that is worn, check out "optivisor" or an equivalent product. I got mine at woodcraft. It has a visor set-up and is adapted to receive a two lens magnifying unit, (means). The magnifier comes in various strengths. The highest magnification is ten. (diopter?) It is not cheap because those lenses are made from optical glass and not plastic. Alternatively, hardware stores sell a desktop lighting fixture that has a circular fluorescent bulb with a magnifying lens in the center. But I believe that it is only 2 or 2.5 diopter which may not be enough magnification. Beware of the junky 'Chinese' knock offs, they break quickly. How do I know that? Only my hairdresser knows for sure. I hope that helps. SLAG.
  9. JABOD dimensions

    The comma usage in the place of our decimal point is encountered in much of Europe. But you can, also, find it in Quebec. JHCC it is 'commic', but not always. I remember reading a reported law case involving a contract between a French company and an American one. The American company was not aware of the different usage. That misapprehension cost them tens of thousands of dollars. They sued in order to have the contract annulled. But the French court was not buying it and they lost. The moral of the story is hire a local consultant or law firm to go over the contract. Please don't ask me for the reference. It was years ago and I do not even remember where I read it. Cheers, SLAG.
  10. Vinegar and German silver

    Marc et al., The silber, that you read is the German word for silver. But silber referred to the color of that alloy. Wikipedia states that there is no silver metal/element in German silver. Let me quote a little of their article on the alloy namely, Nickel silver, Mailechort, German silver,[1] Argentan,[1] new silver,[1] nickel brass,[2] albata,[3] alpacca,[4] or electrum[5] is a copper alloy with nickel and often zinc. The usual formulation is 60% copper, 20% nickel and 20% zinc.[6] Nickel silver is named for its silvery appearance, but it contains no elemental silver unless plated. It is a very interesting article. And it discloses the origin of the alloy. Namely Ching dynasty China, called paktong. SLAG.
  11. What does bespoke mean?

    Bespoke work is concerned with the making of an item, specifically for one person. And those items were usually specific to the desired style, dimensions, etc. of the buyer. Before the Industrial Revolution and factory manufacture, most items were the subject of bespoke work. Examples were smithed (locks, latches, hinges etc.), shoemakers (boots, etc.) and most other chattels that were made. Such work make manufacture slow, and costly. Obviously, wealthier people could afford more goods. And poorer people could afford very little, such as bare necessities. (e.g. a plow, a gun ((in the 1700's and earlier)). These days, bespoke work still happens but is very much less common. It usually is involved with unique goods, like custom furniture, etc. that only some wealthy people order. SLAG.
  12. Vise?

    Senor Charles, Your referenced video is a cardinal example of the old adage, "there is nothing new under the sun". Good one, Senor. SLAG.
  13. Confederate railroad anvil?

    Frosty Effendi, No luck citizen. The statute of limitations has run out for any action of the Sherman interests in the said anvil horn stash. Better luck in your next litigious cause. But 2018 has a ways to go. Vigorous brain storming is advised. SLAG.
  14. Mr. jockey, Thank you for your generosity in supplying the reference. It IS appreciated. Have a safe, prosperous, healthy. and happy 2018. (Hey! let me expand that wish to all i.f.i. denizens.) SLAG.
  15. Deb's Mother

    Frosty, Just ran into this thread. Our prayers and sympathies go out to you from me and Marg. We feel for you and Deb during this dreadful chain of sad news. Leave taking is a companion of old age. But it's never pleasant. Please remember that we are with you two and will help out if you need anything. Dan.