Quote:

---

The rationale behind the use of a bong is the claim that the cooling effect of the water helps to reduce the chance of burning the mouth, airways, and lungs, thus many claim that using a bong to smoke is safer. The water can trap some heavier particles and water-soluble molecules, preventing them from entering the smoker's airways.[6] Thus the mechanics of a bong function similarly to those of a laboratory gas washing bottle. This "filtration" can lead to the belief that bongs are less damaging than other smoking methods.

However, a 2000 NORML-MAPS study found that "water pipes filter out more psychoactive THC than they do other tars, thereby requiring users to smoke more to reach their desired effect".[7] In the study, smoke from cannabis supplied by the NIDA was drawn through a number of smoking devices and analyzed. An inhalation machine, adjusted to mimic the puff length of cannabis smokers, drew smoke through a standard bong, a small portable bong with a folding stem, a bong with a motorized paddle that thoroughly mixes the smoke with the water, and two different types of vaporizers. Comparisons to traditional non-filtered smoking methods were not included in these experiments.

MAPS[8] also reviewed a study that examined the effects and composition of water-filtered and non-filtered cannabis and tobacco smoke. It found that when alveolar macrophages were exposed to unfiltered smoke, their ability to fight bacteria was reduced, unlike exposure to water-filtered smoke. It also found substantial epidemiological evidence of a lower incidence of carcinoma among tobacco smokers who used water-pipes, as opposed to cigarettes, cigars, and regular pipes. "It appears that water filtration can be effective in removing components from cannabis smoke that are known toxicants... The effectiveness of toxicant removal is related to the smoke's water contact area.

Specially designed water pipes, incorporating particulate filters and gas-dispersion frits, would likely be most effective in this regard; the gas-dispersion frit serves to break up the smoke into very fine bubbles, thereby increasing its water-contact area."[8] This study suggests that a bong's smoke is less harmful than unfiltered smoke.

---

Quote:

---

NobodyImportant said:
and im not trying to say that the study is complete BS, I just believe they got too shitty of weed, used weird pipes, and that when studying an illegal drug is difficult to do in todays society

In particular the water pipes they used would have been the equivalent of me putting a bic pen in the side of a 2 liter coke bottle, no proper diffusion technology

a good bong can probably filter the water 10x better than a single downstem bubbling straight up

See this pic, each of those downstems filters the smoke differently and each produces a different hit

---

Quote:

---

Magash said:
ISO hash is not covered under prop 215 and isn't covered under medical guidelines cause of the butane use to make it. Many clubs don't know this and stock it.

---

ISO hash is made with ISOpropyl alcohol not butane, hence the name ISO hash.

most people refer to the "hash" or "oil" made with butane as BHO or butane honey oil (some call it butane hash oil).

there are different names and slang but ISO is definitely not made with butane.

just a small correction. love your grows by the way.

Quote:

---

In summary, it appears that water filtration can be effective in removing components from marijuana smoke that are known toxicants, while allowing the THC to pass through relatively intact. The effectiveness of toxicant removal is related to the smoke's water contact area. Specially designed water pipes, incorporating particulate filters and gas dispersion frits would likely be most effective in this regard; the gas dispersion frit serves to break up the smoke into very fine bubbles, thereby increasing its water contact area. While individuals vary greatly in their smoking technique, state of health, dosing regimen, and so on, it seems that many patients could benefit from the use of water pipes to deliver THC. This would allow patients to titrate their dose easily while reducing the health hazard associated with smoke.

---