Dry rendering heats fat tissue without added water. The suet is cooked slowly at controlled temperatures, the rendered fat is separated from the solids, and then filtered. No water is introduced into the process.
Wet rendering uses water or steam in the cooking process. It can produce a lighter-colored, lighter-aroma product but introduces moisture that must be managed, and results in a different texture and flavor profile.
The choice of method affects what the finished tallow looks like, how it smells, and what it performs best in. Neither method is universally superior — they produce different products suited to different applications.
Ranch Hand Rendering uses dry rendering as its standard method. Wet rendering is available on request for specific applications.