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> Washing With Rosin!
Gorf
post Jun 15 2009, 10:47 AM
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Hi All

As I jumped into the shower this morning I ripped open a new bar of soap. On reading the ingredients (sad I know) I was rather surprised to read that rosin was one of them. I wonder if I could use my new bar of Pears on my bow or wash with my violin rosin? (IMG:style_emoticons/default/wub.gif)
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fsharpminor
post Jun 15 2009, 11:21 AM
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Ha Ha, it wouldnt do your bow any good at all. Wearing my chemists hat ( I specialise in chemicals from natural oils like soap, fatty acids, glycerine etc), some soap can contain a salt of Tall Oil Fatty Acid, which is a by product of papermaking, and contains some things called rosin acids.
Rosin for your bow is Gum Rosin usually ex China or Portugal, and known in the chemical trade as 'colophony'
I guess it's not beyone the realms of possibility for a very small amount of this to be present in soap if it is a special exfoliating one.
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lottie
post Jun 15 2009, 01:15 PM
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Pears soap is lovely - it's fantastic for soft clean skin. It has a wonderful, unique smell too (IMG:style_emoticons/default/wub.gif)

(I buy it in bulk from Tesco and always get strange looks (IMG:style_emoticons/default/ph34r.gif) )
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fsharpminor
post Jun 15 2009, 02:12 PM
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I think Pears will have quite a bit more glycerine content (several %) than most other soaps. Glycerine is a good moisturiser. Contents should be on the label
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stetenorve
post Jun 16 2009, 07:42 AM
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Way (IMG:style_emoticons/default/offTopic.gif) but why do we use the expression to "jump into the shower"? I use it frequently!

Clearly nobody would dream of actually jumping into a shower cubicle, because of the health and safety considerations (IMG:style_emoticons/default/wacko.gif)

must stop thinking, and go to work!
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Gorf
post Jun 16 2009, 09:39 AM
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(IMG:style_emoticons/default/blush.gif) Don't you jump, I always jump over the "lip" of the shower tray. Perhaps not to be encoraged amonst the ladies due to the risk of causing black eyes! (IMG:style_emoticons/default/blush.gif)
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Fibi
post Jun 16 2009, 11:55 AM
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Just looking at the label on my bottle of "traditional lemonade"-type of stuff and it has glycerol ester of wood rosin listed as a stabiliser.

Drinking rosin, as well as washing with it?! (IMG:style_emoticons/default/tongue.gif)
Wow, it really does get everywhere (IMG:style_emoticons/default/wink.gif)
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fsharpminor
post Jun 16 2009, 01:35 PM
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That didn't surprise me, glycerol esters are found in all sorts of products in the food industry, particularly glycerol monostearate, but this wouldnt be too far away chemically from a glycerol ester made from rosin fatty acids.
Sometimes its astonishing how one chemical can have so mnay different uses, I trade a lot of stearic acid, (made from palm oil). One minute I can be selling to a tyre producer (mould release agent), next a sweet manufacturer (eg Polo mints, as a tabletting aid) and next a pharmaceutical company making suppositories (so you know where you can stuff that ! (IMG:style_emoticons/default/biggrin.gif) )

Gum rosins main use is in adhesives by the way, but maybe that's not too surprising.
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