Before using whetstone, what must chefs decide to use as a lubricant?

When using a whetstone to sharpen knives, the choice of lubricant can significantly affect the sharpening process. Both water and oil can serve as lubricants, but they each have distinct effects on the whetstone and the knife being sharpened.

Using water can help to create a slurry on the surface of the whetstone, which in turn helps to carry away metal filings that accumulate during sharpening. This slurry can also provide a smoother surface for the blade to glide over, making it an effective lubricant for many types of whetstones, especially those designed for water sharpening.

On the other hand, oil is typically used with oil stones, which are designed to work optimally with a thicker lubricant. Oil helps to lubricate the whetstone and prevents clogging by feeding oil into the pores of the stone, which can improve the sharpening effectiveness and prolong the life of the stone.

Deciding to use both water and oil is sometimes seen in specific contexts, as certain whetstones might perform differently depending on the type of blade or the desired edge. However, the key point here is that a lubricant is necessary for effective sharpening, and both water and oil can be appropriate depending on the tool and technique being used.

Ultimately, the decision to use