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Author Topic: Liquid Soap: Dishwashing versus Handwashing John Hegel Expert Film Handler Posts: 166 From: Lake Mills, Iowa Registered: Sep 2000 posted 10-13-2004 12:48 AM                        Dawn has a better ability to lift grease and cleanly rinse away. This may not seem like a big deal, but when there is residue left on a food surface bacteria is more likely to grow. When washing dishes it is a good idea to dip them in a solution of sanitizer and let them air dry. (yeah, I know I'v worked in food service to long)  |  IP: Logged William Hooper Phenomenal Film Handler Posts: 1879 From: Mobile, AL USA Registered: Jun 99 posted 10-13-2004 01:51 AM                        Detergents are "synthetic" in that they were designed. Soaps are also synthesized, from fatty acids & an alkali, but in an older, more easily stone-age process like Granny cooking up some soap in a pot from boiled-down animal fat with an alkaloid added to attach to the broken-up hydrocarbon chain to create the soap molecule. Detergents are also made from "natural" ingredients, but there are more steps to creating the components from junk found in nature. A soap is a made by taking one of these fragments of a hydrocarbon chain & attaching at one end via another, free molecule a segment which is attracted to water. You then get a long chain molecule (not one of the cute symmetrical ones) which has an end which attracts water (hydrophilic) & one which is repelled by water (hydrophobic). The water gets all up in the molecule, the molecule gets all up in the water, the surface tension of the water molecules' attraction to each other is broken up, & it can get around the target filthiness to bust it loose. The synthesis of soap is historically from a long chain hydrocarbon animal fat which is broken up, & then an alkali such as sodium hydroxide is added which bonds to one end of the chain. The sodium hydroxide end becomes the hydrophilic end of the soap molecule, & the rest of the molecule terminates with its hydrophobic, hydrocarbon chain regular self. SODIUM HYDROXIDE!!!!!! You can shortly digress into considering the either/or nature of solubilities. The quick chemistry class rule is "like dissolves like". Hydrocarbons will dissolve hydrocarbons (they have nonpolar bonds, which is why you don't put gasoline in a 2 liter plastic coke bottle), water which forms polar bonds will dissolve other things with polar bonds (okay let's not go there). The problem with soap is that the sodium hydroxide end will also react with acids & metals. Then, the molecule becomes the soap scum molecule at that end, thus no longer having a hydrophilic end, & sending that molecules usefulness in breaking up surface tension to zero. So, the idea is to design that molecule so that it uses something that doesn't react with metals. Sulfur trioxide is useful here instead of sodium hydroxide. That's basically a detergent. Soaps & detergents are both surfactants, but a detergent is a surfactant that's not a soap. But you know, now that you've done your designer chemistry on the hydrophilic end, you can also fool around with the hydrophobic end (the end that hates water but cuddles to grease & oil). Different detergents are designed for different purposes, to work on different things. So you can have a hydrophobic end that's designed to be even more reactive with specific oils than soap's. (And you can add other stuff in the box like enzymes, etc. if you want). Mark's right, Dawn dishwashing detergent is the neatest, most broadly-effective detergent for most techy-projects & greasy mechanical parts thing out there. Cleans the starter you took out the car, cleans your greasy post-took-the-starter-out-the-car hands very well too, although it stings like a booger on any little cuts. Clean those parts up well afterwards though, leaving no detergent behind, & dry them VERY thoroughly immediately so the things don't oxidize (rust, corrode) after the detergent has done its job of getting the water in everywhere! I'd hazard a guess that Mark blasts all the water out with compressed air. Soaps are generally better for the environment than detergents. You'd rather release more sodium hydroxide (a common, reactive base) into the environment than sulfur (a metal) or other things that are used to create one end of a detergent's molecule or the other. A page about soap & detergent! The Professor on Gilligan's Island could cook up soap all day (from what? squirrels? birds?), but couldn't even put together a basic spark gap transmitter! What was he a professor OF, anyway? If you get marooned on a deset island, you want Dan Bouvier there instead of the coconut-centric professor! Dan Bouvier would have a functional Nikolai Tesla-scale monster spark gap transmitter assembled from available part, disrupting satellite transmissions, & boggling the mind!  |  IP: Logged Bruce McGee Phenomenal Film Handler Posts: 1776 From: Asheville, NC USA... Nowhere in Particular. Registered: Aug 1999 posted 10-13-2004 08:20 AM                     The professor was brilliant. This was somehow pointed out to the viewers almost weekly during the series run. It was Gilligan and the Howells that kept making the professor want to commit murder. If I had to look at Mary Ann and to a lesser extent, Ginger, all day every day, I'd probably forget some important details, too. What about the mad doctor on a nearby island? That house looked like it was built by craftsmen... just a short small boat ride from Gilligan's Island. Was it closer to the shipping lanes? What a morning!  |  IP: Logged Mark Hajducki Jedi Master Film Handler Posts: 500 From: Edinburgh, UK Registered: May 2003 posted 10-13-2004 09:37 AM                     According to some definitions detergent is A cleansing agent; anything that cleanses. so soap would be a detergent  |  IP: Logged Steve Scott Phenomenal Film Handler Posts: 1300 From: Minneapolis, MN Registered: Sep 2000 posted 10-13-2004 10:03 AM                     Bruce, thank you for calling Ginger the "lesser extent." She is way too overrated. Most people can't see that, even after thirty-some years  |  IP: Logged Randy Stankey Film God Posts: 6539 From: Erie, Pennsylvania Registered: Jun 99 posted 10-13-2004 02:01 PM                     I would say that, functionally, "soap" and "detergent" are virtually the same product. However, I would point out that there are often other ingredients in some products that are meant for hand washing like moisturizers and extra disinfecting agents. In detergents meant for dishwashing, there are likely to be wetting agents and stuff that aren't good for the skin on a long-term basis. I would say that you certainly can use hand soap for washing dishes but you are likely to have a thin, microscopic film of moisturizer left on your dishes. Likewise, there's no reason you can't wash your hair with Dawn dishwashing liquid but if you did it for a long time I would expect your hair to become dried out and you might get dry skin on the scalp or other places where the detergent touches. In other words: In a pinch? Yes! All the time? No. My favorite all-around soap is Dr. Bronner's Castile Soap You can wash with it. Do the dishes. Wash the car. Shave with it. Brush your teeth with it. Wash your hair. Probably about 1,000 other things. I use it because a lot of other soap irritates my skin during the winter time.  |  IP: Logged Clint Koch Phenomenal Film Handler Posts: 1435 From: San Luis Obispo, CA, USA Registered: Feb 2002 posted 10-13-2004 06:11 PM                     Until you get used to Dr. Bronner's Castile Soap you may experience some interesting tingleing in certain parts of your body. Great stuff!!!  |  IP: Logged Phil Hill I love my cootie bug Posts: 7595 From: Hollywood, CA USA Registered: Mar 2000 posted 10-13-2004 06:27 PM                  So Clint, just *what* parts of your body are you washing with this soap that tingles? >>> Phil  |  IP: Logged Clint Koch Phenomenal Film Handler Posts: 1435 From: San Luis Obispo, CA, USA Registered: Feb 2002 posted 10-13-2004 06:35 PM                     The first time I used was years ago and just about every part of my body felt it. More so in certain areas than others . You should try it Phil. Like I said, its great stuff. I used it to shower, shave and brush my teeth so you can use your imagination if you must. Got it from my hippie dippie older brother who was way into all things organic and orgasmic so you get the idea.  |  IP: Logged Phil Hill I love my cootie bug Posts: 7595 From: Hollywood, CA USA Registered: Mar 2000 posted 10-13-2004 07:02 PM                  Ummm... WTF RU talkin' 'bout Clint? Are you like on dope or something? I asked a straight-forward question and got a gobbly-gook answer... >>> Phil  |  IP: Logged Randy Stankey Film God Posts: 6539 From: Erie, Pennsylvania Registered: Jun 99 posted 10-13-2004 07:25 PM                     Yes, when you wash with Dr. Bronner's soap it does have some "zing" to it! Yes, Phil... It makes a tingling sensation in your "nether regions"! But you get used to it after a few times and you dont' even notice. They make several different kinds, now. I like to use the Eucalyptus kind. And... I suppose if you use too much of it, you can get a bit loopy. It IS made from hemp oil! I don't necessarily use it because it's an organic product. I use it because I get a rash when I use some kinds of soap. I tried Dr. Bronner's once to see whether it irritated my skin. It didn't so I kept on using it. As far as I'm concerned, being an organic product is a bonus. I've tried brushing my teeth with it. THAT takes some getting used to! I wouldn't do it all the time but if I was travelling, camping or have run out of my regular stuff, I'd use it again. Oh! And, if you stay out late getting drunk and you don't want your S/O to smell the booze on you, put some on a wet wash cloth and wash up with it before you crawl into bed. The scent of the stuff can cover up just about anything. As a matter of fact, you should just wash up with it every night when you go to bed, anyway. That way your sweetie won't get wise to your tricks when you come to bed smelling all "minty fresh". This is time-tested advice. It won't work when you come home all stinking drunk but if you've had a few on the way home, they won't be able to tell... At least not by smelling you!  |  IP: Logged Phil Hill I love my cootie bug Posts: 7595 From: Hollywood, CA USA Registered: Mar 2000 posted 10-13-2004 07:48 PM                  quote: Randy Stankey Yes, Phil... It makes a tingling sensation in your "nether regions"! That's cool Randy. BUT! IF I want tingling in my "nether regions" it's cuz of a person that I think is hot and makes not only my tongue hard... And! That's NOT a soap! >>> Phil  |  IP: Logged Randy Stankey Film God Posts: 6539 From: Erie, Pennsylvania Registered: Jun 99 posted 10-13-2004 10:09 PM                     What if you had that special person AND some soap and some... Oh, never mind. You get the picture!  |  IP: Logged

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