Can I add glycerin into oil when making CP Soap

[fnddoctor]

Please I need an expert guidance on how to add glycerin into a cp soap?

 

[akseattle]

@fnddoctor I can't tell you how to add glycerin to your CP soap as I've never done that.
Can I ask why you'd like to do this? Is it that that your hoping it will result in a more transparent soap?
Out of curiosity, I read some old threads on this forum where the addition of glycerin was discussed. Other than one person saying that they mixed their colors (micas?? clays??) in a small amount of glycerin, most other posts were pretty lukewarm on the idea- and commented adding too much could give the soap a sticky feel. Apparently, glycerin is created during the saponification process, with your finished bar of soap containing 7-10% glycerin.
So, anyway, I'm wondering why you want to add the glycerin. Maybe that would determine WHEN or how you might add the glycerin,

 

[Cindy D.]

When I was mixing oxide colors with glycerin, it was a lot harder to get the colors to blend with the oils.

 

[Relle]

Provide your recipe to get help.

 

[squidstings]

I'm aware of 2 methods for CP/HP(non M&P) glycerine soap.

1. Lye+water+glycerine mixed before adding to oils
2. Add lye to heated (check for temperature requirements. 230F I think), undiluted glycerine. The mixture will remain stable once cooled as far as I've been told.

Haven't attempted my glycerine recipe yet. No experience to speak of. Just the 2 methods my research has turned up.

 

[DeeAnna]

Please I need an expert guidance on how to add glycerin into a cp soap?

For bar (NaOH) soap, just add the glycerin to the water or other water-soluble liquids in your recipe. Glycerin is water soluble, not fat soluble. That said, I'm not sure why you would want to do this unless you're making transparent soap.

Regular types of bar soap contain 7-10% glycerin that's naturally produced during saponification. Adding more glycerin to this soap carries a risk of the soap becoming overly soft and unpleasantly wet during humid weather.

For liquid (KOH) soap, dissolve the KOH in an equal weight of water and then add glycerin to the KOH and water mixture.

Do NOT try to heat glycerin up and dissolve dry alkali in the hot glycerin. While I know in theory that this can be done, I also know it's risky in practice, and this method doesn't offer any benefits that warrant the added risk.

Just dissolve the alkali in at least an equal weight of water -- much safer and faster -- and then add glycerin to the alkali and water mixture.

 

[squidstings]

Do NOT try to heat glycerin up and dissolve dry alkali in the hot glycerin. While I know in theory that this can be done, I also know it's risky in practice, and this method doesn't offer any benefits that warrant the added risk.

"Theory"? You can watch it on Youtube.

"risky" We're already using pure lye! Which will heat simple water up past "be careful" all by itself. Not to mention the burns it alone can cause Why not just advise OP to stick to melt and pour?

Mixing the lye into hot glycerine will create it's own characteristic. I plan to use it for a KOH liquid soap recipe (next project) because it makes a thicker LS with the same amount of water. But I haven't looked into other characteristics yet.

I have heard that as a humectant, Glycerine, can both give AND strip moisture from the skin.

Don't let someone who's never walked the grass prevent you from attempting your goals. Sometimes you aim for the moon and land on mars!

If you stick with lye soaps, DO, be careful though! Hot KOH water doesn't feel good lol Burn doesn't look anything like fight club says. And a couple years later, the brown spot is almost gone But be careful!

 

[AliOop]

Don't let someone who's never walked the grass prevent you from attempting your goals. Sometimes you aim for the moon and land on mars!

@squidstings it sounds like you are unaware that DeeAnna has a PhD in chemistry - which is why most of us here on SMF take her advice quite seriously.

Just because someone else has done it on YouTube doesn't make it safe or advisable. You won't land on the moon or Mars, but more likely in the hospital emergency room if you try combining lye with hot glycerin without knowing the significant risks thereof, and the serious precautions that must be observed.

 

[squidstings]

What specific kind of chemistry PHD?

I've spoken to a few PHD types. Even a professor who teaches them. All clueless about explaining, or even discussing my experience.

If someone on Youtube did it, is it a mere "theory" ad miss PHD chose to state?

If a PHD doesn't know it's an actual chemical process that works..... creates a credibility issue for me. But I'm pedantic. I don't live in the world where I care to know what others meant. If you're gonna teach/share, inaccuracy is unintelligent. at best.

Is a thicker LS not a desirable characteristic? Op may be working on a bar, but to state, with a PHD behind you, that there's nothing desirable to be gained from that process if incredibly arrogant.

At least answer OPs actual question before trying to scare them away from a little extra safety precaution.

 

[AliOop]

She does know the procedure, and she never said that it didn't work. She said there were safety concerns that outweighed the minimal benefits (if any) to doing as described in the video.

She also provided a perfectly acceptable alternative procedure that avoids the safety risks while still garnering all the benefits of using glycerin. I am so grateful to have learned this alternative procedure from her and use it reguarly - works great!