If we want a 10% superfat, we are adding oils representing 10% of the lye needed to saponify all the oils (basic recipe + superfat oils). if 20:80, then 0.2*O1 + 0.8*O2 There is no guarantee in CP that the oil YOU want to make the superfat will wind up as the superfat. Your basic recipe says 87g of lye needed at 0% superfat. I’ve used this calculation ever since and never had a bad batch of HP soap! I am not really sure about this, would be really helpful if you could advise :)) thanks! This makes a very inexpensive bar and is one of our favorite recipes. Handcrafted soap, whether hot- or cold-process, involves the addition of fats and oils to one of the caustic alkalis, sodium or potassium hydroxide. Have been doind CP soap until now and want to make HP ať last and still I didnt know how to calculate – and I know found this! For example, if you have a soap made up or three oils; olive, palm and coconut, then project 5% super fat from the lye calculation at start, you will end up with a combination of all three oils in your 5% super fat. . I always recommend to superfat at 5% as standard, so when you use the Savvyhomemade lye calculator for soap making you … The fast, easy and reliable way to create soap recipes! I made a batch based on your calculations but after an hour of cooking I get a zap. And E calculates the lye required to superfat at a certain percentage for all oils including superfat oils? Because it’s a water soluble product, glycerin is added to the water stages of lotion making. The final % of superfat of your soap can be … Can you please make me an example of a simple formula using 1000 g of oils? If try to add 5g of coconut oil to soap made from 95g of olive oil, you are basically adding 500 fatty acids to 50*95 = 4750 fatty acids. Press calculate at 0% superfating rate. Well, it was getting quite late last night and I was finishing up my last batch of soap. If coconut oil has more fatty acids than olive oil, this means that let’s say (now I invent numbers) 1g of coconut oil contains 100 fatty acids, while 1g of olive oil contains 50 fatty acids. Without your superfating oils it should read 100%. Thank you for your work and contribution. Although that would be nice, it simply isn't true. Enter the weight of the superfating oil into the appropriate space and press calculate at 0% superfating rate. In Hot Process (HP), the lye is finished working, as a result of using heat to accelerate the reaction, when the soap is put in the mold. Shea butter 5%. …your guide to making natural soap and other bath & body products! Note; right above the “Oils” heading is a % window, it tells you the total % entered. 87/0.9 = 96.7g (or 3.078/0.9=3.42 oz) – This is the amount of lye needed to saponify 100% of oils. Too drying? D = (3.42-3.078)/0.128 = 2.67 oz. Note: High amounts of coconut oil can be drying, however you can always use a higher superfat to counteract the drying effect. You might want to read it first, as I explain there why in hot process (HP) and only in hot process, the calculation of the superfat should be based on the saponification values and not on the percentage of oils. Your total percentage should now read 105%. But, the ratio of water to lye changes slightly; the soap with a 0% superfat has a ratio of 1 part lye to 2.2 parts water, while the soap with the 5% superfat has a ratio of 1 part lye to 2.4 parts water. Adding 1.48oz of shea butter and 1.43 oz of avocado oil (which need 0.379 oz NaOH) then makes it 9.2% superfat. When I am making hot process soap, and I’d like more than one color, I do it after the soap is cooked. This is the Lye weight necessary to Saponify all your oils and fats including your superfating oil. Subtract the superfating oil Lye amount from the All oils and fats Lye amount. Press calculate at 0% (at this point it does not matter what the % is). Let me know, if it is more comprehensible, I shall re-write the post soon…. If you understand what SAP stands for and why it is needed to calculate the right amount of lye, you will understand why it shall be used for calculation of the superfat. I’m so not math smart,I use oz only and I’m very confused now. It is, indeed, it is the total lye required to saponify all the oils, including superfat I just added the definition for clarity also to the E formula. Now we don’t really care about this in one-oil recipes, nor in the cold process recipes with mixed oils. And if you're willing to forego some rules, it can be among the foremost versatile, too. There if you discount 5%, you discount 5% of one oil, or of a mixture of oils, where fatty acids are already mixed well and so 5% of the unsaponified fraction has the same amount of fatty acids as each of the nineteen 5% portions of saponified fraction. If you are a new soaper, or just want a better understanding of superfat and water amounts, and how to use the SAP chart to create recipes this video will explain it for you. Should I let it cook longer with the superfats? Hi Veronika – I added grams to the calculation example. Press calculate at 0% superfating rate. what is superfatting soap, how do I add it and does it help | Contact Info | Privacy Policy. If you want to make sure that all of your superfat is the oil you have selected, use the hot process method and add the superfat after the cook just before placing the soap into the mould. Enter total oil weight, in my case 36oz. A definite bookmark. works for more oils, of course, the very same way. … In other words – you calculate superfat based on saponification values, not based on grams of oils. The statement on how to calculate superfat is correct, if you mix the oils and then spoon out 50grams of oils and add them once soap finished by HP. What you did is to get 10% superfat, but 8.7% of it is shea butter (cause that is the 65g that did not change) and 1.3% of superfat is mix of the oils from the base recipe that are unsaponified. I learned from Irena on the teach soap forum (which is all cp) that the lye would take whatever fat it wanted/needed and what was left over would end up being the super fat. Hi Evik, thank you for the great post. I have a recipe that would call for 5.4 oz of Cocoa butter to get a 10% superfat, or 5.8 oz of Shea butter to get 10%. Once the calculations are completed, do we use the “B” or the “E” amount of lye when executing the recipe? All I want to do is add my super fat after I cook my soap. Hi Belle, the superfat is calculated based on the calculation of lye, this is how you find out the percentage. Superfattng typically is used to make soap more moisturizing. I do not understand how much of everything to use. Free online lye calculator for soap making. Learn how your comment data is processed. I bought everything that I need to start this but I do not for the life of me understand the calculations. After reading everything, and re-checking what superfatting actually IS, aren’t you really just trying NOT to saponify 10% of your oils if you are looking for a superfat of 10%? Hi, thank you foot the helpful tip. I got my water mixture out of the fridge and whisked it into, I'm interested in making my own soap and shampoo bars, but my young son is allergic to all nuts and possibly to coconut. Is it correct, what I’ve been told elsewhere, that if I want to make lets’s say 5% superfat for a 1000 g batch, it would be 50 g of oils to superfat… So I would run a recipe though soap calc with 950 g of the oils and 0 % superfst and then add 50 g after gel phase? I introduced there a formula on how to calculate the % of superfat given a recipe in the hot process method. Soap with a higher superfat has a less concentrated lye mixture than soap with a lower superfat. I was already thinking to adjust the post to make this more clear, though, since noone really reads other posts first :). However, superfatting allows you to add extra oil that won’t saponify, leaving you with a soap that has luxurious oils left over to nourish your skin. This was exactly what I was looking for and I’ve been studying this for some time now. Arggggghhh. Olive 3.08 oz, Lye 3.44 oz Superfat % formula for HP soap. To tack on to Peter’s question and your answer above, I have a math calculation I want to make sure is correct. Then it is a simple math: 500/c(4750+500) = 9.5% …this is not 5%, right? What about if you want to superfat with two oils in combination that have different SAP values, like Cocoa Butter and Shea butter? Seems a bit challenging for me. Now enter all your oil percentages into appropriate spots without the superfating oil. We want to superfat this basic recipe with shea butter and castor oil at 10%. How is putting the oils in after the cook different? I want to super fat my batch of soap but don't know how much extra oil to use. D – is the amount of the superfat oil we need to add to achieve C, E – is the amount of lye needed to saponify all the oils (the basic recipe + superfat oils) at 0% (in other words if superfat oil was part of the recipe and you did not superfat at all), E = 3.078/(1-0.1) = 3.078/0.9 = 3.42 oz And I wrote them down a bit differently. So the recipe would be: 138g palm oil, 138g coconut oil, 317g olive oil and 65g shea butter. 20.8oz/0.9=23.11oz making your total oils 23.11oz, and therefore the other 10% would be 23.11oz-20.8oz= 3.3oz And then it would not matter what kind of oil you use, especially because none of the superfatting oils are going to be saponified anyway, since they are added after the cook. 135 g (4.8 oz) palm oil It seems that I could saponify the base recipe with this amount of lye, then add my 65g shea butter to get my 10% superfat of shea? How to make Hot Process Soap: Gather all tools, utensils, ingredients, and other supplies including your molds and prepare your work area. (or 0.128 SAP * x = 0.342 oz => 2.67 oz) of shea butter, or 75.5g (or 2.67 oz) of castor oil, or basically any combination of the two as soon as they add up to 75.5g (or 2.67 oz) (we can do this, because they have the same saponification value), B – is the lye needed to saponify at 0% the basic recipe (in your case it is 3.078 oz) I appreciate your explanation about this. Otherwise, you cannot swirl, or add multiple colors. (%) If there’s too much water lost, then the soap at the cook’s end will be challenging to work with. Step 3: Mix up your lye solution. My question is: if I want my superfat oils to be a percentage of total oils, can I use the equation from your last post to calculate lye amount? Cool! SIGN UP for my newsletter, and receive for FREE my 25 page E-book, Making creams with all natural emulsifier Olivem 1000, Making 100% olive oil soap – tips, tricks and why it should be avoided by beginners, http://curious-soapmaker.com/superfat-vs-lye-discount.html, Find Soap Making Supplies at NaturesGardenCandles.com. Would it be correct to divide both amounts in half (50% plus 50%, or 2.7 oz of Cocoa butter plus 2.9 oz of Shea butter) to achieve the proper amounts of each to add to arrive at the 10% superfat figure? Here's what I mean: Traditionally, soaps are made of 5-7 oils blended to balance cleansing/moisturizing/and lathering properties. Each oil has its own saponification value, or the amount of lye it takes to turn 1 gram of oil into 1 gram of soap. Can you combine the way that you superfat hot process soap if you have soapcalc superfat your soap recipe at 5%, but you want an additional superfat after the cook for a total superfat of 8%? If, however, you only used 3.44 oz, then you have 0.311oz NaOH less then you should, which makes it overall 0.379+0.311=0.69oz of NaOH that you did not add, which makes it 16.7% of superfat…, i did get the calculations wrong. Go to the Lye calculator and press start over. But… It’s too complicazed for mě also because ounces are so hard to jmagine ;)) Write down the Lye weight in oz, and the weight of the superfating oil (almond oil in my case). There is a common and perpetuated myth that adding goat milk to your recipe significantly increases the superfat, "raises your superfat by 5-6% to make an extra creamy bar," or that "if your soap is made at superfat of 5% and you use goat milk you will really have 11% superfat." If that is the case, then wouldn’t it be much easier to look for the amount of oils that would make 10% of your total recipe, and then use enough lye to fully saponify the other 90% of oils to a 0% SF? But what if I do want to calculate it vice-versa? What you are trying to do is not add 10%(superfat oil) to the 100% (0% superfat) making it 110% but actually converting the total fully saponified oil (0% superfat) to 90% and then adding the extra 10% to make them 100% correct? For example, if you have a soap made up or three oils; olive, palm and coconut, then project 5% super fat from the lye calculation at start, you will end up with a combination of all three oils in your 5% super fat. Both castor oil and shea butter have both 0.128 SAP. 5. …etc. As soon as you know how much you need for each oil, than you can simply combine them. Palm Oil: Hard: Mild stabilizing lather, hard, long lasting bar: 25-50% I actually am a math person, have always done very well, so I did not have a hard time understanding your explanation. Adding extra oil to cold or hot process soap after it has traced or cooked is called superfatting. I tried to make the text more clear, so I rewrote it. When we make cold process soap, it’s a mathematical formula that looks like this: (oil amount) x (SAP value) = lye amount needed. Coconut 16.50 oz Powered by WordPress and Mystique theme by digitalnature | Copyright: Eva Budinska, Curious Soapmaker. A too high superfat can leave the bar of soap … Castor 2.42 oz I’ve had no problems before. The SAP value of Cocoa Butter is .126 Just to clarify, being a noob and all, “basic recipe” = oils – the superfatting oils? [ Instructions ] Are you making solid or liquid soap? Since they have different SAP values, would I use your last formula: D=(E-B)/SAP for each SAP value separately? Otherwise, the soap could be too drying, very cleansing, and harsh on some people's skin. Water 8.5 oz O1 – amount of one oil to get 10% superfat Raise the superfat. Note: By raising the coconut oil your soap will be more cleansing and less moisturizing. I used SM3 to calculate my formulas and that’s how I arrived at that number. I want 10% superfatting with Cocoa Butter and Shea Butter mixed together at an equal percentage. And this means you can only superfat this way in at the end of HP. I hope I did not loose you here. Thank you for responding here is the recipe: The resulting page will show the oil weights including your superfating oil weight. Loved it. This looks like maybe something I can trust more than my running numbers. SAP – is the saponification value of the superfat oil you want to add (0.128 for castor oil) Hi Jacqueline, could you, please, give me an exact recipe? Enter percentages of all fats and oils used in recipe including superfating oil, which is 5% as I want to superfat to 5% (if you want to superfat to 7%, enter 7%). From this point of view, there is no reason to add oils we do not wish to saponify “at trace”. Great tutorial! Can you simplify that formula for me? I’m HORRIBLE at math, and the above post is HORRIBLY confusing for me. Is B equal to lye required for all oils including superfat oils at 0% superfat? Your website is a great help to me, by the way! I have also added a bit of honey after the cook. yes, sorry, I did not define it clearly, you are right! According to the equation from last post, if I added my shea at the end with these calculated lye amounts (per SoapCalc), my superfat would only be 8.7%: Instead of solving for superfat, can I use 0.1 for the superfat, and calculate the amount of lye needed to saponify the base recipe like this: Solving for x would equal 85.6 g of lye. Because the oils are mixed and we calculate SAP for the mixture of oils. Turn the oil on high, cover and allow the oils to melt, about 15 minutes, depending on … I am not sure when are you adding the shea butter and avocado oil, but normally, if you HP your basic recipe with 0% lye discount (which is what you should do when superfatting), of course, it can zap before you add your superfatting oils, since there are small differences in superfat.

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