This will probably sound bizarre, but what's your most brittle material? Can I print a very thin mesh or coil from it? I need it about as fragile as a christmas tree glass ball.
Frosted Ultra Detail (FUD) being acrylic is quite fragile and can go down to 0.3mm wall thickness, even 0.5mm wall thickness is quite easy to poke a hole through with a wet frayed cocktail stick (I was experimenting cleaning & removing print lines from a model)