hello@24 hours
i have tried it all and i want to make it with a kind of glasbowl because copper is nt very safe when its heated .....
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High purity copper is probably safer than glass in most respects, particularly for home made vaporizers. Pure copper (or rather the protective inert copper oxide/CuO molecular coating on its surface) is as non-toxic and safe, including when exposed to air or water and heat, at it comes. Copper has been used for water supplies, cooking, brewing, coins, etc. for 1,000s of years. Glass is a complex impure variable mixture of silica and many other inorganic materials and metals. The melting and boiling/vaporization points of copper are significantly higher than glass, including pyrex/borosilicate glass. Physically, glass is inherently brittle, prone to breakage, also flaking/delamination, particularly if heated/cooled (even if pyrex). Glass flakes and delamination are a rarely discussed problem, and even affects the mainstream pharmaceutical industry (e.g., see
http://www.contractpharma.com/issues/2013-06/view_features/glass-flakes). And keep in mind, the glass could now well be made in China (now including Pyrex brand) or other developing country.
Copper is solid, homogeneous, comes in known high purity alloys (which are numbered, meet standards; go for the electronic grades), can be easily worked/shaped, and is not going to break. Glass is breaks, can't be shaped, is not pure, its composition/type is rarely known and increasingly questionable, and can be low quality. I'd rather vape out of copper than glass. Various marketed vaporizers use copper.
And if you still don't want to use copper, consider stainless steel.
Although I haven't been active on it recently, I'm confident if you check out fuckcombustion.com (vaporizer discussion group) you'll find threads about copper being perfectly acceptable for vaporizers.
