Guest guest Posted October 27, 2000 Report Share Posted October 27, 2000 , Indeed you are missing the point entirely. Actually a W/O emulsion has a larger quantity of water in it than most O/W emulsions. The point of difference is the structure of the emulsion and the feel on the skin. O/W emulsions are what most creams and lotions are comprised while cold cream, which is very greasy is a W/O emulsion. If you read my original post further you would have seen that I further characterized the differences: pH, conductivity, cooling effects etc... Young KY Labs Innovators of Fine Personal Care Products www.kylabs.com w/o and o/w emulsions Hi, I really don't see the significance between the w/o and o/w emulsions. I have copied kevin's statement below: " Emulsions systems are classified into two broad groups; Oil in Water(O/W) and Water in Oil(W/O). By far O/W emulsions are the most common type used today. With them the water or external phase is the continuous phase and the oil is the internal or dispersed phase. A water in oil emulsion is the exact opposite. " I need to know what point I am missing. It appears that the oil-in-water emulsion is simply a formulation using a high percentage of water, such as a lotion. And a water-in-oil emulsion is a formulation that has a small percentage of water to oil, such as a cream. What is the significance? Are we talking about a different type of preparation? For example, when I make lotion I typically heat both oil and water phases, but add the water to the oil--but I have a high percentage of water (80%) so I am assuming that my lotion is an o/w. If this is correct, then I understand the o/w piece. Could you give an example of a w/o? Also, I did look in the files section, but did not see anything on emulsions. Thank you, Angie in SC Quote Link to comment Share on other sites More sharing options...
Guest guest Posted October 27, 2000 Report Share Posted October 27, 2000 > Also, I did look in the files section, but did not see anything on emulsions. Angie, look in the links section. Pat. Peace, Joy, Serenity House of Scents tm. Body Oils, Fragrance Oils, Incense, Candles, Soap, Etc. achil@... http://houseofscents.safeshopper.com/ www.yourhealthandbody.com Quote Link to comment Share on other sites More sharing options...
Guest guest Posted October 27, 2000 Report Share Posted October 27, 2000 funny to see other people on here at this time in the morning :-) Dianne in WA Re: w/o and o/w emulsions > Oh JULES! THANK YOU! [yeah, I'm still up] how was Tony? <sly grin> > > > the oil was just broken up into teeny pieces and smothered in water! > > that's what made me 'get' it. > > > So for W/O emulsions, the water is broken up, and smothered in oil! > (sounds > > charming doesn't it?) Which is why W/O emulsions feel greasier - coz the > > greasy bit is on the outside! > > THANK YOU! [and the chemists are asleep] lol > > what time is it there? it's 1:20 a.m. here. > > Janine > > > > > Quote Link to comment Share on other sites More sharing options...
Guest guest Posted October 28, 2000 Report Share Posted October 28, 2000 Hi Angie, I didn't really get it either, until I happened to be ready something while eating some rocky road.. LOL. So here goes, the unscientific version. Oil in Water (O/W) Think nuts in chocolate. The chocolate is the continuous phase, ie, all over the place. The nuts are the internal phase, ie covered by the external or continues phase. I cant remember what it was that I was reading, but I suddenly got it, that the oil and water did not actually blend together to create new types of molecules, but that in O/W emulsions, the oil was just broken up into teeny pieces and smothered in water! So for W/O emulsions, the water is broken up, and smothered in oil! (sounds charming doesn't it?) Which is why W/O emulsions feel greasier - coz the greasy bit is on the outside! Hope I haven't just confused you more, but it made sense to me. And I hope I haven't just completely appalled the chemists. cheers, Jules in Oz > Hi, > I really don't see the significance between the w/o and o/w emulsions. I > have copied kevin's statement below: > " Emulsions systems are classified into two broad groups; Oil in Water(O/W) > and Water in Oil(W/O). By far O/W emulsions are the most common type used > today. With them the water or external phase is the continuous phase and the > oil is the internal or dispersed phase. A water in oil emulsion is the exact > opposite. " > > I need to know what point I am missing. It appears that the oil-in-water > emulsion is simply a formulation using a high percentage of water, such as a > lotion. And a water-in-oil emulsion is a formulation that has a small > percentage of water to oil, such as a cream. What is the significance? Are > we talking about a different type of preparation? For example, when I make > lotion I typically heat both oil and water phases, but add the water to the > oil--but I have a high percentage of water (80%) so I am assuming that my > lotion is an o/w. If this is correct, then I understand the o/w piece. Could > you give an example of a w/o? > Also, I did look in the files section, but did not see anything on emulsions. > Thank you, > Angie in SC > > > Quote Link to comment Share on other sites More sharing options...
Guest guest Posted October 28, 2000 Report Share Posted October 28, 2000 Oh JULES! THANK YOU! [yeah, I'm still up] how was Tony? <sly grin> > the oil was just broken up into teeny pieces and smothered in water! that's what made me 'get' it. > So for W/O emulsions, the water is broken up, and smothered in oil! (sounds > charming doesn't it?) Which is why W/O emulsions feel greasier - coz the > greasy bit is on the outside! THANK YOU! [and the chemists are asleep] lol what time is it there? it's 1:20 a.m. here. Janine Quote Link to comment Share on other sites More sharing options...
Guest guest Posted October 28, 2000 Report Share Posted October 28, 2000 yeah, and WE better get to bed or it'll be awful trying to get up in the morning. I go thru my emails and bookmarks at nite, trying to get things cleaned up. but I'm hittin' the hay now. Janine oregon, medford, podunk town. I would've called it a village, but I think there's too many others in oregon that have that description. <g> > funny to see other people on here at this time in the morning :-) > Dianne in WA > Quote Link to comment Share on other sites More sharing options...
Guest guest Posted October 28, 2000 Report Share Posted October 28, 2000 Hello Everyone, Thanks for the response about the w/o and o/w emulsions. The rocky road analogy was helpful, but I do still have some questions. Maurice/, are you there? I read the article in links and found it excellent on several points, and I do understand the difference between the two types of emulsions, but still don't really understand what preparation would involve to lead to one or the other. Perhaps someone could better define the " dispersed phase " or internal phase and the " dispersion medium " or external phase--if there is a different preparation. For example, when I make a lotion, I add my water phase to my oil phase after heating---what type of emulsion am I making? I am sure there is a simple explanation that I am missing! I would really appreciate some clarification on this. Thanks, Angie in SC Quote Link to comment Share on other sites More sharing options...
Guest guest Posted October 28, 2000 Report Share Posted October 28, 2000 wrong Jules, Janine...I was the one in the chat (Jules in Vancouver) last night, not Jules in Australia who has epiphanies while eating ice cream....*grin* And I had a lovely time with Tony...as I do every Friday night, when my husband is asleep... *grin* (Tony's my best friend...we haven't been 'involved' for about 16 years...) Jules in Vancouver > Oh JULES! THANK YOU! [yeah, I'm still up] how was Tony? <sly grin> > > > the oil was just broken up into teeny pieces and smothered in water! > > that's what made me 'get' it. > > > So for W/O emulsions, the water is broken up, and smothered in oil! > (sounds > > charming doesn't it?) Which is why W/O emulsions feel greasier - coz the > > greasy bit is on the outside! > > THANK YOU! [and the chemists are asleep] lol > > what time is it there? it's 1:20 a.m. here. > > Janine Quote Link to comment Share on other sites More sharing options...
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