I found a local source for propylene glycol. Does any one have experience dissolving powered developer in it? I'm having xtol in mind. Since it comes in such large packet, it would be nice if dissolving it in propylene glycol instead of hot water can make the stock last much longer. I know the staining developer Pyrocat-HD comes in two ways, one in water and one in glycol. I read the glycol version can last for years.