- Joined
- May 29, 2007
- Messages
- 2,668
- Reaction score
- 1,441
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- Location
- Ghent, Belgium
- Printer Model
- SC-900 ET-8550 WF-7840 TS705
Glycerol is consumed by many microbes, but propylene glycol and ethylene glycol are powerful preservatives. 15% propylene glycol and above is enough to effectively stop the growth of bacteria and fungi. Even some dyes have preservative action.