If you're into stained glass work, you know how important good copper foil is. This Edco 3/16 black backed copper foil is seriously top-notch stuff. The adhesive they use is crazy strong - probably the strongest out there according to most crafters. What's really cool is they use 'dead soft copper' that just molds perfectly to your glass pieces, making everything look cleaner and your finished work way stronger. The black backing gives such a professional finish to your projects. This stuff lasts too - I've had rolls sit around for months and they're still as good as new when I come back to them. It holds up against all the chemicals we use in stained glass work, so no worrying about it breaking down or discoloring. The 3/16 width is super versatile for most projects. Whether you're a beginner or been doing this for years, you'll appreciate how easy this foil is to work with. It saves you time since it adheres so well, and your soldering lines come out so much smoother. Seriously, if you've been frustrated with cheaper foils that don't stick well or deteriorate quickly, give this Edco foil a try - it's worth the investment for sure!