@1442 1/8" Double Strength (or just DS) is mostly used for windows and cabinets. Single Strength is 3/32" and used in light applications like picture frames. Not actually double the strength, but in full 4x8 foot sheets, SS is definitely more flexible. DS can be used in knapping, I use it all the time, but you'll generally want to cut it preformed only a little larger than the point you want to make since you have to treat the edge like a mini-slab. 1/4 plate is best to work with, I've learned a lot about turning that 90 degree cut into an edge with it. My favorite to knap is the flakes we take off of dalle de vere slabs. 6x12" and 1" thick. We flake them with hammers and toss the flakes, I always grab a small box full so I've got all kinds of colors. They're flat on one side but can be worked easily and the top "hump" thinned down. I'll make a new post showing those. If you have a stained glass studio near you, go in and ask if they do dalle de vere windows and if they have any of the garbage flakes. Most likely get them for free as they normally just go in the trash.
