The smell of butter was in the air when we walked into Ribbon Bakery. Two sizable ivory-white marble islands are where the owner teaches her baking classes. The marble lights up the whole space, but how to maintain this elegance? Cream, jam, edible pigment, spices, and other ingredients commonly used in baking, even if the owner is carefully maintained, it is challenging to avoid the dye into the countertop. She knows cleanliness is the most basic but vital respect for all customers and students, much less she manages the bakery alone. No matter when the class is over, the owner…

Most designs that focus on dark materials aim to create a calm space and also to avoid dirt and stains being too visible in future use. However, stains come in all colors, and the most stubborn of them all is limescale. Deposits of calcium leave grayish-white marks that can ruin the aesthetics of an all-black kitchen sink...