Primitive Archer

Main Discussion Area => Flintknapping => Topic started by: TreyNC on February 04, 2009, 02:44:43 pm

Title: Getting a bottle bottom out whole?
Post by: TreyNC on February 04, 2009, 02:44:43 pm

So I made my first points today! Yes they are ugly and non functional. I used glass bottle bottoms. My question is how do I remove the upturned rounded edge of glass? Every time I try to break this off to have only the convex bottom, I break the bottom into two pieces.

pics to come.

Title: Re: Getting a bottle bottom out whole?
Post by: Hillbilly on February 04, 2009, 02:49:36 pm

Usually if you use the shake-the-nails method, there isn't much edge. You can usually trim it off carefully with a small hammerstone.

Title: Re: Getting a bottle bottom out whole?
Post by: xin on February 05, 2009, 01:11:47 pm

You  are on the cusp of learning a valuable lesson that will carry over into the knapping of chert, especially long pieces of chert.  Be very careful when hitting the turned up edge. care must be used to hit it hard enough to get off the piece you want but not hard enough to break the piece in half.  You will remember this when you have a good Clovis pt going and you hit the end too hard  and it breaks in half.   

Title: Re: Getting a bottle bottom out whole?
Post by: james parker on February 05, 2009, 10:50:10 pm

the old ronco bottle cutter,or score a line the heat over a candle while spinning the bottle slowly

Title: Re: Getting a bottle bottom out whole?
Post by: leapingbare on February 06, 2009, 12:05:25 am

Hey Robustus, i enjoyed your new web site.
Anyone who has not yet checked it out.. its really cool.

Title: Re: Getting a bottle bottom out whole?
Post by: uwe on February 06, 2009, 02:38:39 pm

Tie a petrolsoaked cord around the bottles bottom, light it and wait till its burned off, then put it into water and the bottom will fall off. There`s another effect, you`ll have a windlight now. Put a candle into the bottleneck inside.

Title: Re: Getting a bottle bottom out whole?
Post by: mullet on February 06, 2009, 03:44:12 pm

 Diamond saw or Tile cutter works wonders ,too.

Title: Re: Getting a bottle bottom out whole?
Post by: TreyNC on February 07, 2009, 03:28:23 pm

Thanks for the info guys, it's going better. Now I have to try to control the flakes to convex the concave side, this is not so easy for me.

Title: Re: Getting a bottle bottom out whole?
Post by: ZanderPommo on February 11, 2009, 08:38:22 am

saw a trick on tv
fill it w/ water almost to the top, then whack the hole w/ your palm, the pressure will pop out the bottom
(don't hurt yourself)

Zander

Title: Re: Getting a bottle bottom out whole?
Post by: DanaM on February 11, 2009, 10:15:10 am

Check out this video its the best one I've seen on knapping bottle bottoms :)


http://www.youtube.com/watch?v=xh7pc2Q6XFI

Title: Re: Getting a bottle bottom out whole?
Post by: madcrow on February 11, 2009, 10:40:12 am

The prettiest too. ::) ::) ::)

Title: Re: Getting a bottle bottom out whole?
Post by: DanaM on February 11, 2009, 10:44:55 am

Quote from: madcrow on February 11, 2009, 10:40:12 am

The prettiest too. ::) ::) ::)

 ;) O:)