Soap

Processes

There are two processes as far as I can tell

• (naoh+water) + oil -> mold @ 100F - 110F
• (naoh+water) + oil, stir, then add salt -> hard stuf comes to the top (gycern in the bottom bit with the water). The hard stuff is the bar of soap.

I need to flesh this out a bit more. It looks like you get bars in the first process, but where does the gycerin go?

And to make gycerin soap you need to make soap to make the gycerin so huh?

Equipment

• 2 Old pots - 2$
• Digital Thermometer - 12$
• Digital Scale - 28$
• plastic containers - free - used containers from other stuff , yogurt, wood putty
• Goggles , Safety Glasses, Apron
• hand mixer, eg braun hand mixer . I tried to do this by hand and the mix was unreliable. We'll see how the hand mixer goes.

Consumed

• olive oil - 3 litre - 11$ - grocery store
• lye ( sodium hydroxide - NaOH ) - 3kg - 22$ - hardware store

Lye Crystals, easier to find than I thoght, thank you Home Hardware

Oils

hard soft butter all types, why do I want one over another?

• Olive oil - lower enviromental impact, no habitate destruction, sustainable operations. Softer soaps.
• Coconut oil - less habitate destruction , labour concerns, dager pay , child labour. imparts hardness + lather
• Palm oil - lots of habitate destruction. imparts hardness and lather.

Tough decicions.

Scents

• patchouli
• ginger root
• vetiver essential oil - no clue what this is , yet.
• citrus
  • lemon lime orange grapefruit madarine tangerine - extraction? zest? rind? oils?
• dried fruit?
  • apricot cranberry raisins figs
• honey
• oats
• bacon
• Herbs
  • lavender, sage, thyme, rosemary, basil , mint ,
• avacado
• chillies
• vanilla
• trees
  • juniper and fir pine
• cinnamon
• anise

Resources

• http://www.mountainroseherbs.com/bulkmisc/bulkmisc.html

Abrasives

• salt
• sugar
• walnut shells
• corn meal
• ground luffa

Unit notes

• 1 ounce = 28.3495231 grams
• convert KOH Sap value to NaOH Spa values by dividing by 1.403 ( it's the ratio of the molecular weights , see note below )

my Recipes

Not stuff I created ,but stuff I have done or will do.

Used http://www.soapcalc.net/calc/SoapCalcWP.asp for calculations

Roughly

fat + base ( NaOh or KOH ) = Fatty Acids + Glycerol i.e. soap

100% olive oil take 1

ingredients:

Ingredient	Grams
Water	190
Lye - NaOH	66.381
Olive Oil	500

Total oil weight	500
Water as percent of oil weight	38 %
Super Fat/Discount	2 %
Lye Concentration	25.892 %
Water : Lye Ratio	2.862:1

Sat : Unsat Ratio	17 : 83
Iodine	85
INS	105
Fragrance Ratio	0
Fragrance Weight	0 Gm

Ingredient	Pounds	Ounces	Grams
Water	0.419	6.702	190
Lye - NaOH	0.146	2.342	66.381

#	√	Oil/Fat	%	Pounds	Ounces	Grams
1		Olive Oil	100	1.102	17.637	500
		Totals	100	1.102	17.637	500

Soap Bar Quality	Suggested Range	Your Recipe
Hardness	29 - 54	17
Cleansing	12 - 22	0
Conditioning	44 - 69	82
Bubbly	14 - 46	0
Creamy	16 - 48	17
Iodine	41 - 70	85
INS	136 - 165	105

Lauric	0
Myristic	0
Palmitic	14
Stearic	3
Ricinoleic	0
Oleic	69
Linoleic	12
Linolenic	1

So I was unable to disolve al lthe lye , so added more water until I could get all the lye dissolved. Now I have a spongy caustic soap. Next step: create troubleshooting section , see below.

Lessons Learned / Gotchas

• Do NOT use aluminium pots for the work. Lye reacts with aluminium.

• Braun like hand mixers make mixing less work and more effective. Batches made with the mixer are smoother in consistency, and took shorter time to get to the end of the reaction. ( google "braun hand mixer" )

On Scents

I've made a couple of batches of soap now and I'm getting a feel for the chemical reaction, so I'm spending more time thinking about scents.

In a couple of test batches I've put citrus rind in, both Lemon and Orange. Both of which did not work quite as expected. I put the rinds in after making the soap, before I poured it in a mould. I think this is a problem. Two factors I think destroyed the scents. One , the reaction is still going on. This means that there is unreacted NaOH reacting with the scent, rather than with the oil. Two, the temperature is high and that can destroy the scents. The results is that I get a bit of "grit" in the soap, which is not totally undesirable, but more importantly the scent is not there.

So, what to do? I've a different approach. I make the soap sans parfum, let it set, cut it, let it cure. Then I take it to a cheese grater and mix it with the scent and melt it in a double boiler. This addresses the two issues: Once the soap has cured it should not be reacting any more, and the double boiler keeps the heat to a minimum. The soap takes a while to melt using the double boiler method, but it seems to have worked. I tried this with thyme and I have a bar of soap that smells like thyme.

Interesting to note that the colour of the soap changes with the addition of rind , slightly yellowing.

Left to right:Bare soap,Lemon Rind,Thyme

Here are three recent samples. The Bare soap is completely without scent and very white. The soap with the rind has yellow streaks and has a very mild aroma, not clearly citrus. And the Thyme which turned out well, and smelling as expected.

Next up:

• Lemon
• lime
• rosemary
• rosemay + lavendar ( http://www.sironasprings.com/product/provence )

Resources

• http://www.susanparks.com/soapworks/soapworks.htm
• http://en.wikipedia.org/wiki/Glycerol
• NaCl - Salt
• NaOH
• KOH
• The Soap Making Forums
  • Lye Calculators
• Grams of lye for Grams of fat X http://www.thesage.com/catalog/FixedOil.html#Beeswax
• Lye Calculator™ https://www.thesage.com/calcs/LyeCalc.html
• Thread about making NaOH http://www.sciencemadness.org/talk/viewthread.php?tid=5673
• A great Piece on "Sap Values" http://en.wikipedia.org/wiki/Saponification_values

Handmade soap makers who aim for bar soap use NaOH (sodium hydroxide). Because saponification values are listed in KOH (potassium hydroxide) the value must be converted from potassium to sodium to make bar soap; potassium soaps make a paste, gel or liquid soap. To convert KOH values to NaOH values, divide the KOH values by the ratio of the molecular weights of KOH and NaOH (1.403).

• http://www.teachsoap.com/ - lots of recipes
• http://thesoapbar.blogspot.com/2008/07/salt-soap-tutorial-by-ladybug-soapworks.html salt soap bar
• http://www.soap-making-essentials.com/soap-recipe-salt-soap.html
• Processes http://www.soap-making-essentials.com/how-to-make-soap.html
• http://www.soap-making-essentials.com/how-to-make-soap.html - all the different process side by side for easy reading.

Troubleshooting

• http://www.soap-body-and-spa.com/Cold-Process-Soap-Troubleshooting.html