December 2021 Updates from Ken Graham

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February 2021 Updates from Ken Graham


Here's how I've been making flintknapping glass preforms from broken bottles. Start with one of your wife's cookie cutters. Put it back and find a can. Cut the bottom off, bend to shape. Pack some used kiln cloth around its base on the microwave kiln bottom. Place glass chips and chunks inside and remove the can. Place the top on the kiln and cook in a regular microwave for 21 minutes (bottle glass takes longer than Art glass). Remove from oven and enjoy.

Start with one of your wife's cookie cutters

Start with one of your wife's cookie cutters		Put it back and find a can. Cut the bottom off, bend to shape.	Pack some used kiln cloth around its base on the microwave kiln bottom
Place glass chips and chunks inside and remove the can.	Place the top on the kiln and cook in a regular microwave for 21 minutes. From This----	To this!\	To this!

From some glass scraps I fused together in my microwave kiln.


From broken pieces of wine and champagne bottles.


Made some more "obsidian " today. No, it's not actual obsidian. Wine bottles come in a huge variety of colors, and this one was black as night. The thinnest flakes show it is a vary dark transparent olive green. I doubled up it's thickness and flattened/fused two sections of it in my microwave kiln.

Olive brown obsidian point - side 2

Olive brown obsidian point - side 1

Fused together two pieces of 1/8 inch thick art glass that I got from Woody Woodside.



Two more points made from thrift store glass flattened in my microwave kiln.



Made from thrift store lamp shade. Cut it on a tile saw into wedges, then doubled up its thickness and flattened the pieces in my microwave kiln.


I made another point from scrap. Started as some kind of pocket wall hanger from a thrift store. Trimmed off the edges and broke up the small ends to remove the wire loops. Made a pile on the microwave kiln base. Cooked for just over 15 minutes. Cooled for an hour and started knapping.


Upcycled from scrap. Started out as a tempered red glass dinner plate. It turned into crumble when I tried to break it into knappable pieces. I stacked up some of the crumbs and cooked them in my microwave kiln. Good result except the red color turned to black, with just a hint of black cherry at the edges. It did flake well however.

November 2020 Updates from Ken Graham
From microwave kiln fused glass

November 2020 Updates from Ken Graham