I have a glass funnel that I took from my chemistry lab and it fits PERFECTLY into my bong.

I cleaned it out real good since it came from a chemistry lab and its been touched by some nasty chemicals.

It says KIMAX 58 USA on the side

everytime I apply the flame from a lighter to the surface of the glass, a black film begins to cover the glass, and a string odor resembling burnt plastic is emmited. Is this odor coming from some protective coating or something or is this normal for glass, my regular bong piece does not do this, and I want to make sure it is 100% safe to use this before I try it.

thanks
FeedmeWeed Reviewed by FeedmeWeed on . Bowl piece questions I have a glass funnel that I took from my chemistry lab and it fits PERFECTLY into my bong. I cleaned it out real good since it came from a chemistry lab and its been touched by some nasty chemicals. It says KIMAX 58 USA on the side everytime I apply the flame from a lighter to the surface of the glass, a black film begins to cover the glass, and a string odor resembling burnt plastic is emmited. Is this odor coming from some protective coating or something or is this normal for glass, Rating: 5