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Melt & Pour Soap FAQ




If you have a query about Melt and Pour Soap please read on …. the answer is probably here!

 Milky Way Lavender Bar Soap Mould

Frequently Asked Questions about Melt & Pour Soaping

It may take some practice and patience to perfect advanced soaping techniques, but Melt & Pour Soap is very easy to get started with, and it’s great fun!

Note: We cannot offer advice on ingredients, moulds and bases that have been purchased elsewhere as we have only tested the moulds we sell, using our colours, our Essential Oils and Bramble Berry Fragrances. For advice on other supplier’s products, you will need to check with the supplier.

Scroll down to read information on:

  • Sweating – How to Deal with this frustration
  • Unmoulding – my soap is stuck!
  • Layering – Pouring multiple Layers
  • Adding Exfoliants and Clays to Melt & Pour Soap
  • Embedding - Into Loaf Moulds and Single Cavity Moulds and using Toys and Goldfish
  • Using Offcuts and Left over Soap
  • Spritzing with Alcohol and Water Loss – Why?
  • Fragrance and Essential Oil Usage Questions
  • Adding Herbs and Flowers

Sweating – How to Deal with this frustration

Sweating! Why do my Soaps get water drops on them?

This moisture is known as “Sweating” or “Dew”. Our Natural Bases exhibit little sweating in comparison to surfactant based soaps, but it does still occur. This is exacerbated if the base is overheated or the weather is particularly damp and wet. When you see beads of moisture on Glycerin Soap, it is not actually “sweating”, the Soap is absorbing moisture FROM the atmosphere. If your soap does “sweat” it is purely aesthetic, and you can simply wipe it away – it’s still fine to use. Our Melt & Pour Soap contains Glycerine which is a humectant, this means it draws moisture to it and in turn to the skin. The best ways to avoid sweating are:

  • Be careful not to over heat the base. The optimum melting temperature for our custom bases is 40 - 60° C.  If you heat the soap above this; it may “sweat” badly and have a high degree of water loss, which affects its composition. That said, the soap is barely liquid at 40, and we soap at 55 - 60°C.
  • Wrap your soap bars within a day or so, particularly in humid or damp weather, so the soap cannot attracts moisture.  Avoid using cling film long term as this doesn’t age well with soap, try cello sheets, bags or wraps or shrink wrap if you have that available to you.
  • It is best not to put the soap in the freezer to speed up setting time as this will cause sweating. This also makes diminishes the life of the moulds making them brittle over time. (However, this may be needed for CP Soap if it’s S T U C K)
  • Store the unused/unmelted base in an airtight bag or container to avoid it absorbing moisture in between soaping sessions

Unmoulding – My Soap is Stuck! 

How do I unmould my Soap?

If you are not using our soap bases (and/or moulds), you'll need to ask your supplier, sorry.

Firstly, ensure your soap is completely solid and COLD – this means completely set at room temperature. If you are trying to take still warm soap from a mould, you will run into problems. Make sure the soap has set completely - the temperature and hardness are the surest guides. The best way to remove Melt & PUnmoulding a 4 cavity mouldour Soap from the mould is to take a fairly thin, flexible spatula and simply run this around the inside of the mould walls - this allows some air to be introduced between the wall of the mould and the soap. (With flexible moulds, just ease the sides out slightly and this allows the air in). Then turn the mould upside down and run your thumbs from the outside of the mould towards the centre, exerting gentle, but firm pressure. The soap will simply pop out onto the bench, if proving a little stubborn, a gentle tap on the work bench will usually do the trick.

The size of the mould, pouring temperature of soap and ambient room temperature will determine set up time. Allow 1 hour minimum before attempting to unmould single bars. If using a loaf, slab or log mould, leave overnight before attempting to unmould. If you try and unmould too soon, you’ll eventually live to regret your impatience!

For our loaf moulds, gently ease out the sides slightly and you’ll see the release of the soap and the air enter the mould.  Using the palm of your hand, press on the top of loaf mould.  As you apply this firm pressure, you will see the soap start to release from the mould and the air-lock break.  Continue applying light pressure to sides, ends, and top of mould by sliding your thumbs or the heel of your hand over the surfaces until soap releases.

If you experience any problems, half an hour in the refrigerator will help, but this isn’t recommended as a routine way of setting your soap.  If you have been in a hurry, and chilled the soap, allow the mould to return to room temperature before attempting to unmould – this avoids damage to the mould. Using the freezer increases the probability of sweating.

It can be helpful to wash a new mould before the first use as we have found that soap always seems to be easier to unmould from a used mould.

Remember: If you try and release the soap from the moulds by force you will damage and possibly crack the mould. Moulds are not designed to withstand this sort of treatment.

We have individual pages on specific mould usage including these: 

Or you can see all the tutorials on this link

Layering Soap 

Layering into Melt and Pour Soap


How do I layer different Colours?


To create a rainbow or layered soap is very easy when you know how!  Calculate the weight of soap required
for your finished log/bar and divide it into a separate container for each colour. Use scales for accuracy.

  1. Melt the first portion, and colour it and pour into the mould.  Spritz with alcohol.
  2. Whilst this is setting, melt the second colour portion, and when the first layer is still a little warm, but solid enough to support a layer of soap, spritz well with more alcohol
  3. Then carefully pour on the next layer, ensuring it isn’t too hot – this will melt the under-layer if it is too hot. Spritz immediately with Alcohol to remove any bubbles
  4. Continue with this method until you have completed pouring all the layers.

BIG TIP:  Use non bleeding colours (Liquid Brite Pigments, Micas and Dispersions) unless you want the coloured layers to all meld and bleed into one big tie dyed mass


Why did my layers fall apart when I unmoulded?

Melt and Pour alcohol spritz

There are a couple of things to check if your layers peel apart when you are unmoulding or slicing the soap.


  • You either forgot to spritz with Isopropyl Alcohol, or didn’t use enough alcohol to “glue” the new layer to the one underneath.  So liberally spritz that alcohol!

  • You may have allowed the previous layer to get too cold before the next pour. The first layer should still be warm when the next layer is poured. Timing and temperature is the key to working with layered soaps.  Allow each layer to form a skin solid enough to hold the heat and weight of the new layer before pouring the next layer. Use your finger to “test” the strength of the skin before doing the overpour.




Embedding into Melt and Pour Soap

Adding Clays and Exfoliants to Melt & Pour Soap


My exfoliants Sank!


  • The usual reason for exfoliants sinking in your soap is that your poured the soap when it was too hot. The heavier the exfoliant, the cooler the soap needs to be before you pour. For instance, Loofah rarely sinks to the bottom, but Ground Pumice Stone, Walnut Shell and Bentonite Clay Beads are quite heavy, and you must allow the soap to cool a little before pouring. If it has become a little too cool, just give it a little "nuke" to melt it again and re-pour

  • When adding Clays to Melt & Pour it is best to moisten it before adding to the Liquid Soap - this avoids any dry clumps or pockets of air. You can use a very small amount of Water or Glycerine, or even the Essential Oils or Fragrant Oils to moisten prior to adding to the soap.




Embedding Soap & Toys

You can embed slivers, chunks or curls of either Melt and Pour Soap or Cold Process Soap.

How do I get my Embeds in the right place when using your Loaf Moulds?

Making soap loaves with embedded soap pieces and toys are really popular, but can be very a little frustrating for the beginner.  There are two keys to successful embedding:

The embedded object (we call this “an embed”) and the "overpour".

Temperature control is crucial - if the overpour is too hot, it will cause the soap embed to melt into the overpour.  The next challenge is to k

Embedding and Layering into Melt and Pour Soap

eep the embed in the right spot whilst pouring the overpour and during setting.


Try these suggestions:

Pour the overpour in layers.  By this I mean, for instance, if using a loaf mould, pour approximately 1 cm of soap into the base, spritz, and when it has begun set up and has a skin carefully arrange the embeds in the soft semi liquid soap.  Spritz with alcohol and then carefully pour the overpour over that, and so on until you have completed the whole loaf.

If using a log embed, such as a cylindrical embed made in our silicone embed moulds, pour 1 – 2 cm into the mould, spritz, and then carefully lay the long soap into the mould.  Spritz again, and then carefully pour the over pour or other layers over that as usual.

If using single embeds in a loaf you’ll need to make a row of soaps, to be cut into slices later.  The spacing of these is critical.  Don’t forget, if you are using loaf moulds you are usually working upside down, but our Wooden Log Mould (watch for leaks with MP) you are working from the top.  Pour ½ to 1cm of soap and when nearly set, lay out the embeds and then spritz with alcohol.  Pour a thin layer of overpour to fully anchor the embeds into position.  Once really set, carefully finish the overpour.  By lining up the single hearts, or say, goldfish, you can take the cutter using the guide, straight down each side of the embed making single slices of embedded soap.

The timing will depend on how hot the soap is, the size of embeds, the time of year and volume of soap in the moulds.



How do I embed into single cavity Moulds?

Most of the above instructions on how to embed soap embeds in loaves also apply to single cavity moulds for toys, fish etc – just remember that when you unmould, the “top” of the actual soap is the bottom of the mould cavity when you are pouring the soap!  SO………don’t forget to put the toy in upside down!


Embedding and Layering into Melt and Pour Soap

There are several methods to do this:

  1. Melt the soap as usual and chose a suitable fragrance.  Usually you’ll use a clear or tranrent base so that you can get the best clarity and see the embedded soap or toy.  Don't heavily colour this soap because you want the soap to be easy to see.  Set the soap aside and allow it to cool until a thin skin forms on top.  Break through the skin and pour into the mould.  It is important that the soap be a little cooler before you embed the soap inside, otherwise the pieces of soap will simply fall to the bottom.  Alternatively, you can let it cool in the mould and then peel off the skin that forms a few minutes later.  Now, spritz the embed or soap pieces you are embedding AND the surface of the soap with alcohol, and then nudge the pieces (or toy) into the soap.  If it is too cool small bubbles of air will be trapped around the toy, so this method does take a little practice.

  2. Alternatively the toy or soap embeds can be placed directly in the base of the mould.  Spritz with alcohol and pour a little soap around it to anchor it.  Leave a few minutes to set. Then spritz the surface and carefully pour warm/warm-hot base over the top and adjust if necessary.  Allow to cool thoroughly then remove from the mould as usual.

  3. Another method you may prefer is to pour a couple of millimetres of clear soap into the mould.  Allow to set and then spritz the embed (or toy) and place onto this base. Now carefully pour the rest of the soap around the embed/s and allow to set.


Left over Soap pieces

Using Offcuts and Left over Soap



What do I do with the offcuts and bits I have left after finishing a project?

Don’t waste them!!  Depending on the size, they can be embedded into either Melt and Pour Soap or Cold Process Soap to make confetti soap – bright and lovely with contrasting coloured embeds.  But, mostly soapers tend to want to re-melt them, so seal them
into a ziplock bag to keep them fresh and sweat-free and re-melt in your next project.


Spritzing with Alcohol


Why is there foam or bubbles on the back of the soap after I pour it?

Melt and Pour Soap spritzIf you pour when the soap is too cool and syrupy, air gets trapped and then tries to escape as the soap cools.  If this is the case, you’ll
need to shave this off the back of the soap or remelt if the whole bar if it’s really unappealing.

The other reason is that you poured and/or stirred a little over-enthusiastically. Spritz IMMEDIATELY you have poured with Isopropyl Alcohol and instantly the bubbles disappear.  Don’t sniff the alcohol though – YUK – and don’t worry, the smell dissipates virtually immediately and it can’t be detected in your finished soap.


I’ve read that sometimes you should add some water to MP Base –
why would you add water?

This is ONLY DONE if you have melted and re-melted your base repeatedly. Sometimes if you don’t cover the soap as it is melting, or have made lots of batches and have mixed lots of left overs, you may have lost moisture and this affects the finished soap.

We suggest adding water ONLY if you have remelted the base numerous times. The addition of water helps compensate for any loss of evaporation which may have occurred due to multiple heatings.


Fragrance and Essential Oil Usage


What is the difference between Fragrance Oils and Essential Oils?

So much hype surrounds scent! Both of these aromatics can be used for your soap, lotion, shampoo etc. Bramble Berry Fragrances are formulated by specialists for Cold Processed, Melt & Pour Soap and skin care products. They are safe to be used in all skincare and soap products.

Bramble Berry FragrancesWhat is the difference between them then?

Essential Oils are the aromatic liquid that has been extracted from a plant, or parts of plants.  They may be cold pressed, distilled, solvent extracted or C02 extracted. They are often used for their therapeutic value as well as their aroma.  Many are pungent, some are quite amazing, and all are very concentrated.  Even though they are extracted from plants, some people can be sensitive to Essential Oils, just as they can be sensitive to Fragrance Oils.  Always check for contra-indications for their use (which means there may be reasons that you should avoid using an Essential Oil), and they should be used with great care as they are highly concentrated.  For those seeking a totally natural aroma, Essential Oils are the choice for you.

Fragrance Oils are made by the combination of aromatic and non aromatic ingredients – usually synthetic, but many also contain Essential Oils.  We consider our Fragrances to be safe synthetics and they are made purely for cosmetic use and are suitable for use in all bodycare applications.  Fragrances are often suitable for people who may not be able to use Essential Oils and vice-versa.


How much Fragrance or Essential Oil do I use? Some are really strong

Melt and Pour Soap usually requires less fragrance and essential oil than Cold Processed Soap does, so it’s a little more economical.  It can be a little difficult to judge if you don’t measure the amount you are adding because you are adding the scent to hot soap, and this makes the fragrance lift off and you think there is more scent in the soap than there will be once set.  It is a little like using an Oil Burner, the warmth lifts off the volatile oils.
How much fragrance to use in Melt and Pour Soap

There is no exact amount which covers all aromatics because some essential oils and fragrances are very strong, and others lighter and more subtle.  However, as a general guide the following is useful for safety:

For MP Soaping:  You can use Up 2.5% Fragrance/Essential Oil for the weight of the soap. This is the maximum for safety, but mostly we use 1 – 1.5% in Melt & Pour Soap.

Note: Very strong Essential Oils such as Lemon Myrtle, Lemon Eucalyptus & Peppermint etc, should be used at much lower concentration (Maximum of 1.5%)

To scent 500g of Soap Base at 2.5% use 12mls/g of Fragrance/Essential Oil
To scent 500g of Soap Base at 1% use 5mls/g of Fragrance/Essential Oil

If you are measuring in drops, there are approximately 20 drops per ml.

As an example, for a 100g bar of soap at 1.0% you would use 20 drops or 1ml.


Remember, you don't have to scent as high as 2.5% (we don't in MP), so to judge for your taste and nose, make a 100g bar, count the drops of scent you add. Allow to set, sniff, and then keep a note for future larger batches


The scent of my finished soap seems to have faded.

I thought I put enough Fragrance in, but why can’t I smell it?

Occasionally a customer will contact us concerning the "lack of scent" to their finished soaps.  We use Bramble Berry fragrances at every opportunity because we love them, and we have never experienced this unless we have underscented the soap or if the soap is several years old.  Our fragrances are undiluted and should be diluted before use, ie diluted in the soap, a lotion or carrier oils etc.

You can also accidentally affect the scent by “burning off” the Fragrance or Essential Oil scent by adding it to soap that is too hot.  So to avoid this, ensure the soap temperature doesn’t reach more than 50 to 60°C. You can use a thermometer to check the temperature if in doubt.


I think I did something wrong - it's turned brown and gone off!

This question should read:  I added Vanilla Select (or foody fragrance) to my Soap and it has turned brown, has it gone off?

(This question also applies to ANY vanilla or foody scent and many other yummy fragrances)

This is the result of the vanilla in the Fragrance Oil. Most Vanilla Based and Foody fragrances contain vanilla, and some contain more than others. Some like “Country Kitchen” make the soap a creamy beige colour, others like “Vanilla Select” turn the soap dark chocolate brown. The soap appears normal after you unmould, BUT... as the soap ages (this can be as fast as overnight, or as long as six or seven weeks) it begins to discolour. It may begin with just a few areas, or an all over suntan, but within days it can turn a dark brown colour.

Almond Milk discolouration in Melt and Pour Soap

How do you combat this? Plan your soap! Most of the discolouring Fragrances are well worth working with, or we wouldn’t stock them!

If you just don’t want earthy or brown coloured soap, our first suggestion is to avoid them, thus avoiding some of our top selling fragrances (such as Dark Rich Chocolate, Dragons Blood and Oatmeal Milk & Honey). All our Bramble Berry Fragrances have notes in their description, and on your invoice, to alert you to any possible reactions.

Secondly, purchase some Vanilla Colour Stabiliser – this is very economical and you add this at a ratio of 1:1, so if you add 20 drops of Fragrance, you add 20 drops of Stabiliser, or 1 teaspoon of Fragrance, and 1 teaspoon of Stabiliser. This inhibits the discolouration to a huge degree and your soap may only turn cream or ivory colour instead of brown or tan. Vanilla Colour Stabiliser is NOT suitable for CP Soap, only Melt & Pour Soap.

The easiest method is to embrace the scent and work with it! You don’t’ necessarily have to make a chocolate Mocha Cake to use Turkish Mocha Fragrance, but it’s a great idea! You can pour 3 layers, but only fragrance one layer, add some Liquid Brown Oxide or Cappuccino Mica, which enhances the discolouration. The second layer just colour brown to absorb any bleeding of the discolouration, and the top layer could be white or another colour such as cream, and could appear as the “icing on the cake”. Or, stir some exfoliants into the base and allow Oatmeal Milk & Honey to do its stuff, and you’ll have a lovely, uncoloured, delightfully fragranced Oatmeal soap even better if you choose Goatsmilk MP Base!

The variations in the discolouration of Vanilla based scents is huge, and so you can have a lovely display of uncoloured, but gorgeously scented, beautifully moulded earthy tone soaps! YUM!

See our Vanilla Discolouration Info Page HERE


My Soap is cloudy and I wanted really clear soap.

Sometimes if you add a fragrance such as Strawberry, or an Essential Oil such as Mandarin to clear soap it will take on a slight red or orange tone, or sometimes it goes all cloudy and the embeds don’t look very nice. This is sometimes inevitable, so you need to work with your scents, not try and "beat" them.

If an Essential Oil is dark in colour, such as Mandarin, this will colour the soap, at least for a few months.  The same applies to Strawberry fragrance, your will have a slightly red tone, that’s how it is.  Just like Essential Oils, fragrance oils vary in thickness and colour, some are quite clear, others greenish, yellow or orange, and some dark brown.

The cloudiness is a challenge, to be honest, because this may change from drum to drum of Oil. Some fragrances tend to cloud up, and some don’t. We recommend a small sample to check if this is for an important project. Sun Ripened Raspberry is one fragrance that doesn’t tend to do this, but not all work the same way in all bases.

It helps to ensure that you stir the fragrance into your soap thoroughly using slow stirring.  It can take a few minutes to fully incorporate into half a kilo of soap. If the Fragrance is not thoroughly mixed in, it will cloud the base.

You can try the following if it clarity is really important. This will be an experiment – remember, each fragrance will vary, drum to drum, and base to base.

  • Try adding some alcohol (isopropyl is fine) - Up to approximately 2 tablespoons per kilo of soap. Note: this may make your soap a little drying and leave a slight odour.

  • I personally haven’t tried it, but I have read that 2 tablespoons of Sugar per kilo of soap helps with clarity. This may make the soap a little sticky and a little softer.

  • Add 120g (1/4 cup) Vegetable Glycerine per kilo of soap. This may help with the clarity, but will increase tendency to sweat

My personal preference is to do a trial batch, as I like our MP Bases just as they are and work through the issues by testing.

You can also check this page to see which fragrances are "water white" and what that means (it means clarity!).  Read Soap Queen's full blog article here.

Note:  Our saponified bases are made with vegetable oils which means they will always have slightly less clarity and have a pale honey colour in comparision to surfactant based Melt & Pour Soap Bases.


Adding dried herbs to soap

Adding Herbs and Flowers


I grow lots of herbs and flowers, can I add these to my Melt & Pour Soap?

I tried Rose Petals in my soap and they all went brown and/or mouldy – what did I do?


You will always get slimy or mouldy soap if you add fresh rose petals, frangipani flowers to your MP Soap.  That’s unfortunately the way it is. It is a moist environment and they are going to turn into compost!  If you wish to experiment, ensure the botanical material is WELL DRIED and the pieces are very small or fine.  Calendula petals are fine and look so nice in white soap and won’t cause you any problems with mould.  If you add dried lavender flowers, you'll eventually get mouse poo!  So for Melt and Pour Soap either add some dried botanicals on top of the bars so that most of the material is out of the soap, or use a coffee grinder to powder your home grown herbs and flowers and this will add a slight exfoliation, but you'll certainly have them in there.


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