Knapping Glass Points

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About: What Can US do 4 U? just here 2 help.

got this allegedly "antique" yellow glass jar at a yard sale for the change in my pocket, made this yellow glass point to win the Instructables glass contest, cause I could sure use a Dremel, so thank you for voting for it to win the contest, this is my 1st attempt a publishing an instructable so I might have had some trouble getting the pics in the right order, but you get the idea, the pic in step 1 is some antler tools that I use, should have been last

Step 1:

deer antler tools used to Knapp glass points

Step 2:

used a hammer to detach the bottom from the rest of the jar, but in a pinch, rock should work too

Step 3:

next carefully chip off the "lip", using a bopper, the one I used in this case, was of deer antler,

Step 4:

bop the lip off to create a "zig-zag" edge, aka a scissored or working edge all the way around the piece to make a "pre-form"

Step 5:

then use the bopper to "skin" the pre-form of all of its factory edge, the outer layer of glass that contacted the mold that made the jar

Step 6:

as the factory edge comes off the pre-form takes on a rough shape that is ready for pressure flaking

Step 7:

used an antler pick to pressure flake this point out of the skinned pre-form, did it come out good enough to will the Instructables glass contest? thank you for viewing, and your input & don't forget to vote for your favorites, this one;).

Glass Challenge 2017

Runner Up in the
Glass Challenge 2017

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32 Discussions

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Riffifi

1 year ago

i had twice the occasion to watch a guy working flint to create prehistoric tools, i find the process fascinating. i can picture how you did this (though i would have been pleased to see you working!). i've never imagined it could be feasible with glass! you got my vote

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MutantBRiffifi

Reply 1 year ago

thank you, glass is cheap compared to flint unless you have a local source

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lwolinMutantB

Reply 1 year ago

tymtyutlinbilm;9oy uhbjk; liyup.890-

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lwolinlwolin

Reply 1 year ago

that is latin for nice job. that is verv cool

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jtobako

1 year ago

Percussion angle, below the center line, how to grip the glass and in what (looks like terrycloth), abrading the edge for a better strike, striking v pressure flaking...talking about any of them would help.

http://cavemanchemistry.com/oldcave/projects/stone/bottle.html

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MutantBjtobako

Reply 1 year ago

sounds like you knapp? yes it is an old towel, thank you for your feedback I will try to do better next time

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lwolin

1 year ago

your's is very interesting. Have you used obsidian instead of glass?

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MutantBlwolin

Reply 1 year ago

yes, but it came from the rock shop as obsidian don't grow so well where I live anymore thanks to AGW ;)

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pikeslayer17

1 year ago

This looks pretty cool, I also knap glass and thought about making an instructable for this contest, but I don't really need the dremel although it would be cool (: One tip is to explain more clearly how to flake the glass, or add a video. Voted

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MutantBpikeslayer17

Reply 1 year ago

thank you, "explain more clearly how to flake the glass" as a fellow knapper how would you?

have asked that myself, best answer so far, is practice, trial & error, & watch youtube

need to get a real camera, maybe will trade a dremel for 1? :) thanks again

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pikeslayer17MutantB

Reply 1 year ago

You could maybe have some close ups of the positioning of your tool on the glass, or explain a little more clearly about the positioning. Your piece is really nice looking, have you thought about mounting it on an arrow?

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AaronA71

1 year ago

Nice work bro! Like you, this is my first time making an instructables, but it was fun! Hope you win that Dremel!

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rlancaster3

1 year ago

If you warm the bottle over a fire for 5_10 minutes the bottoms will brake off cleanly with less mess.

1 reply