Introduction The world of manufacturing and prototyping has evolved significantly with the advent of 3D printing. Over the past few years, a new player has emerged—4D printing. While both technologies fall under the umbrella of additive manufacturing, they differ in fundamental ways. In this Tech Dogs Services guide, we’ll explore the key differences between 3D and 4D printing and explain how they work. What is 3D Printing? 3D printing, also known as additive manufacturing, is the process of creating three-dimensional objects by layering material based on a digital model. It allows for intricate and complex designs that were once too expensive or difficult to create using traditional manufacturing methods. Common materials used in 3D printing include plastic, metal, and resin. In a typical 3D printing process, a printer follows a set of instructions from a digital file to deposit successive layers of material, building the object from the ground up. Industries such as ae...