Finding out that Rayon thread is not colorfast and can bleed if washed convinced me that I'd never use it. I always wash my work. I also believe these threads must be very old too. They are quite fragile and break easily when pulled on... but they are so BEAUTIFUL!
My solution was to buy a two gallon glass container to display them as a decoration. Would you believe that container is not big enough to hold all of them? I'm not sure what I'll do with the rest, but the drawers should come in handy for something... storing patterns maybe?