I've been reading messages and blogs on cure times and mostly what I see has a maximum of six weeks. Yet, the forum messages under various titles mentions longer times. What is the time for curing? And how can you determine if you have waited long enough before using?
Based on a number of factors...ingredients, lye concentration, time and temperature...four to six weeks is the MINIMUM amount of time you should allow your soap to cure. Part of the curing process is allowing the moisture in your soap to evaporate which produces a harder, longer-lasting bar of soap. My preference is for eight weeks for really no other reason than because it feels right (and it's easier for me to track). But it's winter now and I'm in the Pacific Northwest and it's pretty damp this time of the year so I am giving my soaps 12 weeks.
I just need to know where I can find the statistics for length of time. Or is it experiment and experience?
Experiment and experience mostly...based on experimenting and experience.
Basic rule of thumb (from research and experience), the more soft oils you use the longer your cure time...which is why a 100% Olive Oil Soap aka Castile Soap takes a year to fully cure. Also, your additives can affect how your soap cures...an example of this are salt soaps which do better with a longer cure time, somewhere around six months.
I noticed from your posts that you use HP. I only use CP at this point. I think my cure times are going to go longer. I want hard bars that lather a lot. I got into this because I bought a bar of soap after Christmas two years go from TJMAXX (a discount store in the Eastern US, not sure if it's nationwide).
The cure time for HP is probably longer than for CP because HP requires more liquid. A lot of folks think that HP is ready to go after it's unmolded...and it kind of is, CP can also be used out of the mold too, but you won't have a good, quality soap in either case. Someone will correct me if I'm wrong, but IMHO, the biggest difference between HP and CP is the saponification process. In HP soap, the saponification process is taking place while you a 'cooking' the soap...about two to three hours. In CP soap, while the saponification process starts as soon as you add lye to fats, once it's poured in the mold it takes 18 to 24 hours to complete.
Pacific Northwest...we have both stores here. I got into soap making because of Black Raspberry Vanilla Goat Milk Soap; bought it only for quite a few years and then the lady retired and no more soap for me.
I think I'm going to work on "well balanced" recipes. I'm not sure what this means, but I assume it's using the same type oils (balance between solid and liquid), and balance between percentages, not thing is heavy weighted in one oil.
A "well-balanced" bar of soap is one that is hard and long-lasting, gets you clean, doesn't dry out your skin, produces a nice lather and is soft and silky (creamy) feeling. And there are many ways to achieve it. For myself that is Olive, Coconut, Palm and Castor Oils, Cocoa and Shea Butters, and a little Sodium Lactate and Kaolin Clay. For someone else, it could be Olive, Coconut, Palm, Sweet Almond and Castor Oils. For someone else, that could mean adding powdered milks and Tusah Silk and the list goes on.
Two things I forgot to add:
1) Always run your recipe through a Soap Calculator
2) Soap making is exciting, ruining a batch is not. So start small, with 8o z and 16 oz of oils