Yea just use like ur faucet screen if u need a filter. if u burn the foil smoke comes off. Inhale that shit? No thank u. U CAN do it healthily if u make sure the flame doesn't touch the foil but that's not worth the risk or effort
not just that, crumble a part that has been burned, and watch what falls. the particles are worse than the vapors imo
Don't screw up your faucet for a screen, they cost a dollar for 25 at most head-shops. Tin foil cannot be good for you, so just save 10-20 bucks and get something from your local headshop. They will help you out if your stuck on what to buy.
The flame can touch the foil and it won't burn it unless you seriously light that mother fucker for literally like 20 seconds. You'll be fine, just don't torch it and you're good.