Squares over Triangles

Squares over Triangles

I played with the idea of a bag with triangular cross section a few months ago. You may recall, I ended up rejecting this configuration because it required too much material to get to a desirable volume; and so this time around when I wanted to try out a more exotic look for the Brad, I left the top cross section square and made only the bottom cross-section triangular.

But it turns out that fabric isn’t so stiff as to respect the elegance of the design. For one thing, sharp corners like the angles at the bottom tend to collapse into nothing. The nice rising ‘V’ shape of the back-facing panel just didn’t look V-like.  I’ve often gotten to the point in design of these bags where I’ve thought, ‘if I could just stiffen this edge with a plastic rib…’  But then, that’s not allowed in a bag that’s 100% biodegradable, is it?

So this one was just plain mushy. If I had made it a bit smaller, it would have shown some of the qualities I was looking for, but after a wash or two those might not show up so well.

Here’s me, trying to point out that the bottom of the bag is triangular…whoopie.

Plus: I did discover that if I don’t finish the edges I can make a usable prototype in about an hour! :-)

For good fun I made a very basic square-ended carry-all with just enough strap length to get it over your head in a pinch. It looks like this:

I’m not going to produce this one no matter how badly you want it. Although it has a pretty sleek two-piece design, and it would be very cheap to manufacture, I still think it’s boring. But it’s useful as a benchmark against other fancier designs. If a fancier design doesn’t work at least 30% better than this one, then I won’t produce it.