Re: [sca_moneyer] Spanish Galleon Treasure
- Greetings again,
> A little know fact is that I worked for Treasure Salvors in 1980 ... when the Spainish Galleons Atocha and Margurita were being actively salvaged. I picked up quite a few gold chains off the bottom.Can you share some of your feelings / impressions? I know how I feel when I hold some of the pieces I've been privileged to see (3 different Faberges, some medieval jewelry), but I'm always curious about other's thoughts on the subject.
>I have very strong feeling about the salvage operation mentioned in this posting. I feel that Oddessy did all the research and work and Spain robbed them. If a case can be made for the original owners having the rights to the treasure (which I don't feel it can), it should go to Peru ... the people Spain enslaved to mine the silver!I agree with you entirely, I thought about even sending the URL, but the pics were amazing, so I gritted my teeth and did it...
(Of course, no one else has to agree with me either...)
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- Thanks, I will be using the sandpaper, it seems to be the best way to go.
Quoting klessig <klessig@...>:
>> Would a lapping compound do pretty much the same thing?
> Not entirely no
>> He said he puts the compound in between the two die surfaces and
>> grinds them together
> That will not give you a flat surface!. It will give you two
> surfaces that mate.
>> but I also read that a lapping compound needs to
>> be used on a perfectly flat surface (when the intent is to obtain a
>> perfectly flat surface)
> To get a flat surface, you need to have 3 surfaces, and lap in all
>> and the surface needs to be softer than the surface you are
>> grinding and polishing.
> For efficient lapping, you want the lapping compound to embed in the
> softer surface. This will have the effect of not leaving embedded
> compound in the lapped (harder)surface. In the machining world this
> is important because later the lapped surface will have something
> else moving in it or on it (at high speed), and you don't want
> lapping compound in the "end use" surface because it will wear away
> at the other item (frequently a shaft).
> For lapping dies, that is irrelevant.
>> I was thinking it might be
>> better to do it the way it is being suggested here with the sandpaper
>> because maybe he is thinking more about fitting two surfaces and less
>> about getting a perfectly flat polished surface?
> Exactly, although all we really need as well are matching surface
> for use, and smooth surfaces for esthetics.
>> Would a lapping compound work in the same way as mentioned below?
>> With a marble tile (which I have)?
> It will work ONLY short term, and not very well.
> Marble is SOFT, and will wear away fast. This is why sculptors like
> it. [Ok Only one of the reasons.] but if you are rubbing your die
> and abrasive on it, you will soon have a nice dish. The same would
> be true of glass, and even granite to lesser degree.
> Sandpaper works because the tie is providing the flat reference
> surface, while the sandpaper is protecting it from being rubbed
> against. The sandpaper ends up forming an abrasive slurry that is
> very similar to the lapping compound any way, if you use water or
> oil. I tend to use water based "personal " lubricant, because it
> works better than water alone, and yet doesn't leave the same mess
> as oil.
> Vct Chandra