which is exactly what the product I linked is, its purified by a patented (no idea what the unique factor is) reverse osmosis system, supplied in a BPA free plastic type bottle. I dont intend to reuse it, I will use it as needed, for both drinking and cleaning and buy more when I need it.
I had some just before with a slice of lemon, tasty 😉
Um... Adding that lemon killed the purity right there. Your pure water has now become a very weak solution of citric acid... It'll have a surplus of hydrogen ions in it now. 🙂
As you can tell, I'm not into the whole bottled water fad. I filter my tap water through active charcoal (Britta brand filter) to remove the chlorine taste. That's it. After filtration, the water has no odor, no flavor, no color. It's just water. But each to their own, I guess.
For technical purposes, there are cases where ultra-clean water is needed. DI is usually used for this as distilling is incredibly expensive. For cleaning electronics, I use flux cleaner. It's acetone based. If you want to get real fancy, you'd rinse the acetone off with isopropyl alcohol (aka rubbing alcohol), followed by DI water. That's commonly done in the semiconductor manufacturing world.
~Tom
As you can tell, I'm not into the whole bottled water fad. I filter my tap water through active charcoal (Britta brand filter) to remove the chlorine taste. That's it. After filtration, the water has no odor, no flavor, no color. It's just water. But each to their own, I guess.
For technical purposes, there are cases where ultra-clean water is needed. DI is usually used for this as distilling is incredibly expensive. For cleaning electronics, I use flux cleaner. It's acetone based. If you want to get real fancy, you'd rinse the acetone off with isopropyl alcohol (aka rubbing alcohol), followed by DI water. That's commonly done in the semiconductor manufacturing world.
~Tom
neither am I, its ridiculous! the fridges at convenience stores here are half filled with literally hundreds energy drinks and the other half are different 'health giving' flavored waters, it must be a gold mine!
😉
as stated several times...drinking it for me is secondary (simply a happy byproduct) to the purpose of rinsing the PCBs/modules after reflowing them and first giving them a brush/spray with isopropyl. I use noclean flux and solder, so no other solvents or solutions are needed.
the water is not expensive (that would be the reason I mentioned it), doesnt come with a slogan, any claims other than being pure water, is lacking a refreshingly different, life extending pomegranate and lime flavor, or advertising campaign and is not available in small bottles. They are not a 'boutique' water supplier.
its made in vast quantities in factories all over the country in massive amounts for drinking, scientific and industrial purposes. It is sold in 5lt bottles minimum at the local supermarket, or larger amounts direct. if I so desire I can buy 2 x 20lt containers for $30 or something delivered the first time, then $12 for the 40lt thereafter in exchange for the clean empty bottles... hardly exclusive.
but someone else will come into the thread shortly, only read a small amount of the text written, completely miss the purpose of the thread and add some more skeptical commentary. Luckily i've already been thanked by a few Aussies for the link by PM, so the thread is doing its job.
side note, water with a small amount of lemon is quite good for you and despite containing citric acid, is alkaline forming in the body, not acid forming. its also very refreshing 😉 which would be the main reason I would drink it, sometimes I even add some wild honey and mint from the garden
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I think it's the other way... DI followed by ~99% IPA, to displace the water and evaporate without a residue.
hmm fair enough, i'll check that out, thanks for the tip. I'm only just kitting up for it now, just bought one of the arduino IR reflow oven controller daughterboards to install in a hacked IR toaster oven. there is no residue in this water though, so i'm not sure it matters a great deal. I thought it would be IPA to dissolve any of the flux residues and then DI to rinse; then dry with hot air
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For at home DIY your order of processing is probably best. I've seen board houses that use a similar automated process, with a conveyor sending boards through a blow-dry stage. At the wafer stage I'm not aware of anything like that; likely it is too time consuming.
I never tried it, just vaguely remember from chemistry, and also read here:
Drinking Distilled Water -- Is It Healthy or Not?
I don't think you should get too upset about the reactions and comments here. You did come in with a lot of 9s, and some bold claims. 🙂 We understand the utility and thriftiness of your find, it's great, but it doesn't go farther than that.
As a side benefit, perhaps this will encourage other people around the world to look for cheap, local sources of pure water for special uses, such as we might have for PCBs and such. That would be a nice resource.
As a side benefit, perhaps this will encourage other people around the world to look for cheap, local sources of pure water for special uses, such as we might have for PCBs and such. That would be a nice resource.
I've had a counter top carbon filter on my sink for at least 15 years now (got one when Sydney had problems with crypto sporidiam and giardia outbreaks). 10 year old kettle looked like the day I bought it inside. Got a new flatmate and within a month the inside of the kettle had turned brown (He wasn't using the filter). It also works very well in the iron. Our new place has a reverse osmosis filter.
I wouldn't use the filter for anything critical though. I have bought another brand of water from woollies in the past when I've wanted pure water for critical purposes, I can't remember the brand though (actually maybe it was nobels ultra pure water....) It also came in 5L bottles.
I don't as a rule buy bottled water for drinking, but I always use the filter for drinking water and cooking at home. Sydney water is not bad, but you can immediately taste the difference both directly and in cooking, when using the filtered stuff. The kettle test is the best indicator though of what the filter is taking out 😉 However having just spent the last three weeks in Hong Kong, Macau and China, I've been drinking nothing but bottled water 😉
Tony.
I wouldn't use the filter for anything critical though. I have bought another brand of water from woollies in the past when I've wanted pure water for critical purposes, I can't remember the brand though (actually maybe it was nobels ultra pure water....) It also came in 5L bottles.
I don't as a rule buy bottled water for drinking, but I always use the filter for drinking water and cooking at home. Sydney water is not bad, but you can immediately taste the difference both directly and in cooking, when using the filtered stuff. The kettle test is the best indicator though of what the filter is taking out 😉 However having just spent the last three weeks in Hong Kong, Macau and China, I've been drinking nothing but bottled water 😉
Tony.
upset? no not really, frustrated having to explain the same thing several times within 2 pages when people decide to ignore the content of the post and concentrate on making a reaction to the number, which is clearly for effect? yes. frustrated when I get the same familiar argumentative posts about the purity of the water and its suitability for drinking as if that was the point of the thread, like I had made a claim for 0% distortion in an amplifier design? also yes
whos bold claims?
yeah theres all sorts of crapola for and against, mostly sponsored in some way on both sides. but the fact is, you dont, or at least shouldnt get your nutrients from water, they should be coming from your diet and drunk in normal amounts its perfectly safe. i've been drinking filtered or bottled water in reasonable amounts for years and grew up with tank/rain water, many people live on it quite healthily and if you think the water in the tap in most countries has healthy trace minerals in it you are fooling yourself, most is full of chemicals more than nutrients. if you are paranoid, add a few spoons of chlorine and some tissue salts to the water before ingestion...
mineral water, normal bottled or flavored water 'healthgiving' water (a completely different thing) is big business run by companies like Coke (here in Au it isn anyway) and i'm pretty sure they have a vested interest in talking down the cheaper alternatives.
I suspect these guys are doing OK too, but they are not the same type of company, yes the water I got came in a large 5lt bottle and its water, but thats where the similarity ends really, sales to the public for drinking doesnt sound like its the majority of their business. I think the problem i've seen here is people associating it with the former and memories of that excellent Penn & Teller episode
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It was not clear, I think that's what led to the confusion. Anyway, you found a good, cheap source of pure water. That's good info.
I just hit the 9 key and held my finger down 😉 (i'm serious) I thought the number was extreme enough to be obviously for effect. I was unaware of the 100PPT claim, as he never mentioned it to me and its not written anywhere on the product, coincidentally my number has only one more 9 (using real billions and trillions, not US ones)
the cheap, easily available source of water for short run production, hobby, prototyping, that you can also drink if you desire, was the reason for the thread. I just reread my post and I see nothing that suggests otherwise, I even tempered it with 'essentially pure'.
the cheap, easily available source of water for short run production, hobby, prototyping, that you can also drink if you desire, was the reason for the thread. I just reread my post and I see nothing that suggests otherwise, I even tempered it with 'essentially pure'.
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In the CMOS lab I had access to at the university, the recommended flow was acetone, IPA, water followed by spin drying the wafer.
The IPA was used to dissolve the acetone. The water to dissolve the IPA. Just letting the solvent evaporate would leave the gunk dissolved in the solvent behind, which is exactly what you don't want.
~Tom
That it does! Tea as well. Getting the chlorine out of the water makes for better drinks. Who would have thought... 🙂
~Tom
I've spent some time around a cleanroom etch fab, and now that my memory has been jogged I can remember both sequences. A hydroflouric acid sink finished with a DI bath and a wafer spin dry, while another sink (can't recall the active chemical) had a DI rinse followed by an IPA bath.
Back to the main topic, I don't know what qusp is up to, but would think that the "clothes iron grade" distilled water from the market would be good enough for board cleaning. $4/gal water? Yikes. I wonder if anyone has ever DIY'd a vapor flux cleaner??
I just picked up a bottle of the stuff qusp pointed out, have two or three pcbs here that I'll give a clean tomorrow 🙂
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