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Small scale artisan soap makers find "melt and pour" production useful when trying out new product lines. The process differs from the cold process or hot process in utilising a pre-manufactured solid soap base which has already undergone saponification, so the soap maker does not need to handle caustic alkali, i.e. lye.
"Hot process" soap making also uses lye as the main ingredient. Lye is added to water, cooled for a few minutes and then added to oils and butters. The mixture is then cooked over a period of time (1–2 hours), typically in a slow cooker, and then placed into a mold.
A hot water solution containing 73.1% ... Sodium hydroxide is traditionally used in soap making (cold process soap, ... It is also a common ingredient in oven cleaners.
Soapmakers frequently use rebatching as a way of adding substances that could not withstand the high temperatures or caustic chemical environment of cold process or hot process soapmaking, such as certain essential oils (for example, those with a very low flash point). The choice of liquid affects the character of the finished soap; milk is ...
“I am sure oven cleaner can be used on baking sheets, but the chemicals are very strong and you are using a baking sheet for your food, so I prefer a more natural cleaning method,” says Behar.
Traditional oven cleaners contain sodium hydroxide (lye), solvents, and other ingredients, [3] They work best when used in a slightly warm (not hot) oven. If used in a self-cleaning oven, the lye can cause permanent damage to the oven. Some oven cleaners are based on ingredients other than lye. These products must be used in a cold oven.
For already-used cookware that are to be re-seasoned, the cleaning process can be more complex, involving rust removal and deep cleaning (with strong soap or lye, [12] or by burning in a campfire or self-cleaning oven [13] [better source needed]) to remove existing seasoning and build-up. Then several times the following is performed:
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