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Teach Soap • View topic - Newbe, Can I use a favorite hot process recipe to processe

Teach Soap

Soap Making Recipes, Tips and Tutorials
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PostPosted: Tue Apr 16, 2013 1:17 pm 

Joined: Fri Apr 12, 2013 3:23 pm
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Can we use a favorite hot process soap recipe to make cold process op? :?: ,,,,newbe


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PostPosted: Tue Apr 16, 2013 1:22 pm 
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Joined: Sat Jun 14, 2008 10:19 am
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Location: Lewisville, Texas
Shouldn't be an issue. The only difference between cp and hp is that you cook it for hp. It will take longer to saponify and will require atleast a 4 week cure time.

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PostPosted: Tue Apr 16, 2013 3:31 pm 
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Any cold process recipe can be used as hot process. Just make sure that you run ANY recipe through a lye calculator.

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Closed minds are like faulty parachutes; they refuse to open.


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PostPosted: Thu Apr 18, 2013 5:32 pm 

Joined: Fri Aug 31, 2012 2:26 am
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I've been recently making mostly HP soap, however all of my recipes start out as CP recipes. The recipes are completely interchangeble. The only thing is that you definitely should cut down on your fragrances in HP Soap vs CP Soap. HP doesn't need as much. In HP soap you also have to watch the temp when you add your fragrance oils so that the fragrance doesn't burn off. (Flashpoints). CP you need alittle more fragrance.


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PostPosted: Fri Apr 19, 2013 5:22 am 
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Location: Western WI
Flashpoint is the point in which an undiluted fragrance oil will burst into flames when placed next to an open flame. Fragrance oils with lower flashpoints do not "burn off" scent when put in products at a high temperature. That is a myth.
Whether or not your fragrance oil "burns off" or loses fragrance strength has to do with a fragrance or essential oil's aromatic volatility.

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PostPosted: Fri Apr 19, 2013 10:53 am 
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Every flammable liquid has a vapor pressure, which is a function of that liquid's temperature. As the temperature increases, the vapor pressure increases. As the vapor pressure increases, the concentration of evaporated flammable liquid in the air increases. Hence it is the temperature which determines the concentration of evaporated flammable liquid in the air under equilibrium conditions. Different flammable liquids require different concentrations of the fuel to be present in the air to sustain combustion.

The flash point is that minimum temperature at which there is enough evaporated fuel in the air to start combustion. Therefore, the flash point is (also) the temperature at which the scent dissipates into the air and burns off.

The fire point of a liquid is the temperature at which it will continue to burn after ignition for at least 5 seconds. At the flash point, a lower temperature, a substance will ignite, but vapor might not be produced at a rate to sustain the fire.

In methods where the soap batter and fragrance is exposed to high temperatures for a longer time frame, such as cp/op and hp soaping, eo's and fo's with low flash points do tend to "burn off" resulting in soap that either doesn't smell at all, is very faint, or morphs into something nasty (burnt tire anyone?). So the flash point does need to be considered, especially when using the cooking methods.

class dismissed. Lol

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