Cette page fournit une interface de navigation pour trouver toutes les valeurs d’une propriété et une page donnée. D’autres interfaces de recherche disponibles incluent la recherche de propriété, et le constructeur de requête ask.
Liste de résultats
- *Instead of animal fat, we can use vegeta … *Instead of animal fat, we can use vegetable oil (rapeseed, olive, flax, sunflower...) depending on the availability of the resource. *It is possible to add essential oils in the preparation to have a pleasant smell. *The soap obtained can be a little basic, therefore bad for the skin. To lower the pH, you can either add vinegar to the solution or mix it with clay powder. *The quality of the ash influences the quality of the soap: apple ash, walnut shell ash or finely sifted oak ash gives a good quality soap. Burn the wood at a very high temperature also makes it possible to obtain a whiter ash and thus of better quality for the manufacture of soap. better quality for the manufacture of soap. +
- *Melt the grease in the metal barrel; *Pour in the ash lye; *Bring to a boil to speed up the reaction, mix to avoid overflow. +
- *Recover wood ash, it must be fine and co … *Recover wood ash, it must be fine and come from natural wood; *Mix ash and rainwater in a 1:3 ratio (here 3kg ash for 10L water). Mix occasionally, let stand for about 3 days; *Filter finely into a cloth; we get our base, potash. To test the concentration of our detergent, we can use a very simple technique: dip a chicken feather in the detergent, if it starts to dissolve, the detergent has the right concentration. '''Caution: ash lye is a very basic and therefore very corrosive solution, to be handled with care: If possible gloves and glasses.''' th care: If possible gloves and glasses.''' +
- A soap is normally composed of a fatty aci … A soap is normally composed of a fatty acid (here animal fat) and a basic agent (high pH) such as soda or potash (here made from ash). These two compounds create a saponification reaction that creates soap. The Chemical Process Saponification is the reaction of a fatty substance with hydroxide ions (provided by an alkali such as potash or soda) to give a carboxylate ion (soap) and glycerol (also called glycerin). Soaps are therefore mixtures of carboxylate ions and metal cations (sodium or potassium ions). The carboxylate ion is a surface-active agent that lowers the surface tension of water: it is a detergent. It ensures washing thanks to 4 qualities : The wetting power: soapy water can penetrate the small interstices of the surface in contact (cloth, skin, table, plate...) more effectively than water ; Emulsifying power: the carboxylate ions agglutinate around the dirt and penetrate between it and the surface in contact until they isolate the dirt from this surface. They form micelles containing small particles of dirt. Carboxylate ions have a lipophilic end and are therefore particularly effective against fatty substances; The dispersing power: due to the properties of the carboxylate ions and the structure of the micelles, they repel each other and are therefore dispersed in soapy water; Foaming power: a film of carboxylate ions is formed on the surface of water with low surface tension. By agitating the soapy water, air bubbles can then be trapped. The foam does not intervene as such in the washing but is an indicator of the surface tension of the liquid and thus of its detergent power.he liquid and thus of its detergent power. +
- After boiling, two solutions are offered to us: *Let stand a good hour to obtain a soft dough. By hand, give the soap the desired shape; *Pour the preparation into moulds to obtain the desired shape directly. +
- The grease must first be cleaned of all impurities. To do this, it is heated until it is well melted. The impurities are deposited by settling at the bottom. As it cools, the pure fat forms a solid crust on top. +
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