Isopropyl Alcohol for Cleaning Flux
in [Basics]
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From: GregS on 26 Jul 2010 15:04 In article <slrni4rlsb.9v8.gsm(a)cable.mendelson.com>, gsm(a)mendelson.com wrote: >GregS wrote: > >> 95% is a very good figure. I actually use the NON-denatured stuff. > >How about the drinking stuff? (95% "grain" alcohol). > >Here I can by a "fifth" (750ml) for less than 250ml of 70% Isopropyl. > Yes I was reffering to the ethanol drinkable stuff that is not taxed. Been used for years in medical parties. greg
From: Geoffrey S. Mendelson on 26 Jul 2010 15:14 GregS wrote: > Yes I was reffering to the ethanol drinkable stuff that is not taxed. > Been used for years in medical parties. For some strange reason, the cheapest booze you can buy in Israel is the 95% it costs about 25 NIS a fifth, around $6 INCLUDING TAXES. Geoff. -- Geoffrey S. Mendelson N3OWJ/4X1GM To help restaurants, as part of the "stimulus package", everyone must order dessert. As part of the socialized health plan, you are forbidden to eat it. :-)
From: pimpom on 26 Jul 2010 15:31 David Nebenzahl wrote: > On 7/26/2010 11:49 AM Geoffrey S. Mendelson spake thus: > >> GregS wrote: >> >>> 95% is a very good figure. I actually use the NON-denatured >>> stuff. >> >> How about the drinking stuff? (95% "grain" alcohol). >> >> Here I can by a "fifth" (750ml) for less than 250ml of 70% >> Isopropyl. > > Well, that's ethanol, which should also work fine, so long as > you > don't mind the 5% water. I use medical or denatured alcohol as a general-purpose cleaning solution. When I need stronger stuff, such as on cruds of old and hardened flux or when there's simply lots of it, I use automobile paint thinner. Wiping with a piece of cloth or cotton wool is usually enough and I rarely need to scrub with a brush. The thinner can dissolve some plastics though. So some care is needed, as is good ventilation. It looks and feels somewhat oily but dries very quickly. A one-liter can costs about $3 US here.
From: GregS on 26 Jul 2010 15:53 In article <i2knq7$6ls$1(a)news.albasani.net>, "pimpom" <pimpom(a)invalid.invalid> wrote: >David Nebenzahl wrote: >> On 7/26/2010 11:49 AM Geoffrey S. Mendelson spake thus: >> >>> GregS wrote: >>> >>>> 95% is a very good figure. I actually use the NON-denatured >>>> stuff. >>> >>> How about the drinking stuff? (95% "grain" alcohol). >>> >>> Here I can by a "fifth" (750ml) for less than 250ml of 70% >>> Isopropyl. >> >> Well, that's ethanol, which should also work fine, so long as >> you >> don't mind the 5% water. > >I use medical or denatured alcohol as a general-purpose cleaning >solution. When I need stronger stuff, such as on cruds of old and >hardened flux or when there's simply lots of it, I use automobile >paint thinner. Wiping with a piece of cloth or cotton wool is >usually enough and I rarely need to scrub with a brush. > >The thinner can dissolve some plastics though. So some care is >needed, as is good ventilation. It looks and feels somewhat oily >but dries very quickly. A one-liter can costs about $3 US here. > I got some spray heavy duty flux remover with freon like component, methelyne chloride, ethanol, and another component. Its useless for regular cleaning. It dries too fast. I never had the need to use other than alcohol for flux remover. When I worked in a factory "DEC" in 1969, they had like washtubs with spigots, and turn on the spigot out poured "TRI", trichloroethane. It worked well. I still have a can around saying safety solvent. Sometimes we would try to fix their modules, for some forgotten reason, to fix a computer problem. I also remember fellow in our section, working on something new, computer "terminal monitors". There was some kind of problem, and he was taking some boards into the mens room to wash them off. i guess they worked after that.That was an interesting section with monitors, modems, and UARTS, and the PDP 8i About 7 people. I remember they used to sell cans about the size of paint sprays filled with trichloroethane , sold as fire extinguishers. greg
From: krw on 26 Jul 2010 18:01
On Mon, 26 Jul 2010 19:04:22 GMT, zekfrivo(a)zekfrivolous.com (GregS) wrote: >In article <slrni4rlsb.9v8.gsm(a)cable.mendelson.com>, gsm(a)mendelson.com wrote: >>GregS wrote: >> >>> 95% is a very good figure. I actually use the NON-denatured stuff. >> >>How about the drinking stuff? (95% "grain" alcohol). >> >>Here I can by a "fifth" (750ml) for less than 250ml of 70% Isopropyl. >> > > >Yes I was reffering to the ethanol drinkable stuff that is not taxed. >Been used for years in medical parties. Not a wise move. The un-taxed stuff (not for human consumption) often contains benzene. |