Glass scrapers

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matthew
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Glass scrapers

Post by matthew » Fri Oct 10, 2008 11:39 pm

Anyone else use a freshly cut piece of glass as a scraper? i just fit a DB fingerboard, then pretty much shaped and smoothed a tailpiece using nothing but a piece of broken glass.

Much nicer to use than a steel scraper; doesn't get hot, doesn't need sharpening ...

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Kim
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Post by Kim » Fri Oct 10, 2008 11:47 pm

Been using broken glass for years and I must agree Mathew, it does make a superb scraper. I was first introduced as a child when shaping cattle horn into ornaments such as penguins and albatross and the like. It was fun and effective and I have often carried broken glass scrapers into wood working.

I always found the thicker clear glass of old milk bottles to be best for longevity of the edge however it is true to say that a cold stubby will always get you out of a hot spot. :wink:

cheers

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matthew
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Post by matthew » Fri Oct 10, 2008 11:59 pm

I'd forgotten about glass ... used to use it all the time, then after having just made about 30 picture frames for my wife's current exhibition I ended up with a whole stack of glass offcuts ... I have a few 100mm wide strips of 3mm glass, and cut off a 20mm strip with a curved edge whenever I need a scraper.

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Colin S
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Post by Colin S » Sat Oct 11, 2008 12:15 am

Yes, have used broken glass many times as a scraper. On my lutes and historic instrument repairs I never use modern abrasives so all smoothing is done with glass scrapers.

Custom curved scrapers can also be manufactured as needed. Score the glass with a cutter then snap along the score. The opposite side to the score is the best to use.

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Allen
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Post by Allen » Sat Oct 11, 2008 7:35 pm

I read a while ago, I think it was on Frank Ford's site, about using the glass slides you get for viewing specimens on a microscope. Apparently you buy them by the box and they're cheap as chips. Just the right size for all kinds of jobs, and easy to dispose of.
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Paul B

Post by Paul B » Sat Oct 11, 2008 7:51 pm

Having been a microscopist, I wouldn't think that microscope slides would be a good choice. The good ones have ground edges (hence no cutting edge), while the cheap ones are pretty thin and would be prone to breaking.

I wouldn't normally disagree with anything Frank Ford has to say, but this is the exception.

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Allen
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Post by Allen » Sat Oct 11, 2008 8:37 pm

I'm only really speculating that it was Frank. I can't say for certain, so I'll retract my comment and go sit in the corner. :?
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matthew
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Post by matthew » Sat Oct 11, 2008 11:43 pm

Well, climb outta that corner ... it could have been microscope slides, particularly if they were scored and snapped before use. But I prefer thicker window glass, less likely to snap un-intentionally while scraping.

My mum was an electron-microscopist once, and she used the edges of glass just like this to mount as blades in the microtome (a sort of tiny guillotine for shaving micron-thick slices) to prepare samples for use in the electron microscope

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Lillian
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Post by Lillian » Sun Oct 12, 2008 3:39 am

Allen, come out of the corner. That's no place for you to be. I remember reading about them as well. And, like you, I can't recall who the advocate was, but I recall that it was someone I respected. While I was reading about it, I was thinking that backing it with a thin piece of hardwood might be a good thing. It would help prevent me from inadvertently flexing and breaking the slide.

Paul B

Post by Paul B » Sun Oct 12, 2008 9:48 am

Maybe there are some that are thicker than normal? Just 'cause I've not seen them doesn't mean much.

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matthew
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Post by matthew » Sun Oct 12, 2008 9:56 am

Paul B wrote:Maybe there are some that are thicker than normal?
yeah ... i think we're all here, aren't we??
:eyes

Paul B

Post by Paul B » Sun Oct 12, 2008 10:07 am

I was talking about microscope slides thanks Matt. :D

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matthew
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Post by matthew » Sun Oct 12, 2008 12:19 pm

oh ... i get it ... i think ... hold on, i can't work out if i'm confused or not ...

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