[Jewelry making - Article 00077] - Re: [Orchid] Quick and Dirty Seamless Tubing

[Chino/Reed]

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    Guido - I find the question you pose at the end of your post very
    interesting. Does the relationship (proportion/ratio) of wall
    thickness to "hole" or, in your case, core, change by reducing the
    diameter of the tubing. My experience in drawing tubing is that it
    does not. I know I have tried to create thick walled tubing in
    copper, sterling and gold tubing by drawing tubing down in a
    drawplate. It didn't work. The relationship of tubing wall to tubing
    ID always remained the same. I have been told that metal is very
    plastic - much like clay. I don't have much experience  with clay but
    I have done some workwith Fimo and equivalent  substances. One of the
    facinating things about this "plastic clay"  is that in drawing down
    the images, the ratio or proportion always  stays the same. That is
    how you can do a large "face cane" and draw  it down to 1/10th its
    original size, or even smaller, and the face  always remains in
    proportion - just smaller. I believe the same happens with metal and
    would happen with your drilled ingot technique no matter the
    difference in size between the ingot and the core. 

    I would love to hear the views of others with more experience or
    education in the physics or mechanics of this issue. 

Sheridan

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