Pour the baking soda and salt into the sink. Fill sink two-thirds full with almost-boiling water. Submerge silver for 1 – 2 minutes. Rinse with hot water, and then immediately dry with a soft cloth. How do I get the tarnish off my silver teapot? First, mix a tablespoon each of baking soda and salt; … Read more
If you’ve used or seen color-changing cups before, you may wonder how they work. The main idea, or “magic,” behind them is heat-sensitive technology Once you fill the cup with your favorite iced beverage, it will quickly change to a fun ombre hue design. How do the color-changing Starbucks cups work? If you’ve used or … Read more
The longer the roasting process lasts, the darker the resulting bean and the more oily the bean will look coffee beans contain natural oils that escape from the bean’s interior once the bean passes a certain roast level. Why are some coffee beans oily and others dry? It’s actually very normal for fresh, dark-roasted coffee … Read more
After first crack, the roast changes from an endothermic reaction (the beans absorb heat from the drum) to an exothermic one (the beans release heat). During this stage, the physical transformations continue – beans increase in porosity, oils migrate to the walls of the cell, and the color darkens Which of the chemical reaction occur … Read more