The right temperature can be different for every recipe and sometimes for every soap maker. Candle Soap Making - Wax Melting - LCD Digital Thermometer - Crafts UK SELLER. https://www.naturesgardencandles.com/thermometer-candle-soap One thing is for sure in soap making. Stainless steel - this helps your thermometer withstand the caustic elements of lye. Here are a few other scales to choose from: Add to Cart.