[Jewelry making - Article 01034] - Re: [Orchid] Metric system

[brian]

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>         once you get under half a mm, no one stays with metric 

    I do . Here in New Zealand I was brought up with one way and changed
    to metric. I find it's easy to operate in meters for building my
    studio (plus or minus one or two mm) to refining an accurate master
    (tolerance of .01). If I wanted more detail I'd have a better
    measuring gauge and work to a tolerance of 0.001mm. 

    My biggest complaint about measurement systems is to do with
    teaching jewellery (sorry, jewelry) classes in USA. Wire ga. I don't
    understand the use of ga. How, for example, can you calculate and
    measure half a ga? Let alone calculate and measure and produce a
    piece of wire with, say, 10% clearance in a hole. For these classes I
    usually have to arm myself with mm/ga equivalents and hope I don't
    have to work with that system. 

    Then when I was teaching in Canada I had to order some silver stock
    in both systems: 18" of something-ga wire, 1.2mm plate 6" square... I
    was realling. Or is that reeling. 

    Mind you, I heard a good explanation of farenheit over celcius once:
    0degF - pretty cold for humans but not deadly 100degF - hot for
    humans but not exactly deadly. 

Brian

-- 
B r i a n   A d a m   
e y e g l a s s e s   j e w e l l e r y
518 South Titirangi Road
Auckland NEW ZEALAND
ph +64 9 817 6816 
www.adam.co.nz


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