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3D printing is a transformative technology that creates physical objects from digital designs by
building them layer by layer. It offers great flexibility, enabling innovations in fields like medicine,
aerospace and fashion. This chapter covers the basics of 3D printing, including how it works, the
materials used and its growing impact across industries.

INTRODUCTION TO 3D PRINTING

3D printing is a technology that creates physical objects
from a digital design. It involves making three-dimensional
items by layering materials. This method is used to produce
a wide range of objects, from toys and tools to medical
devices and even buildings, offering a fast, creative and
custom way to make things.

How Does 3D Printing Work?

The working of 3D printing is given below:
1. Create a 3D Model: First, you need a digital design of the object you want to make. This is
done on a computer using special software like Tinkercad. The design can be anything: a toy,
a tool or even a part for a machine. It’s like drawing your object, but in 3D, not flat.

2. Prepare the Design for Printing: Once the 3D
model is ready, the design is saved as a file SMART In 2014, Local Motors
that the 3D printer can understand, usually in a SPARK introduced the Strati, the
format called STL. This file is then uploaded to the world’s first 3D-printed car.
3D printer.

3. Layer by Layer Printing: Once ready, the 3D printer builds the object layer by layer, unlike
traditional flat printing. It uses materials like plastic, metal or even food, which are melted or
softened and deposited in thin layers.
4. Finishing Touches: After printing, the object may need cleaning or smoothing, with excess
material removed. Some printers use special materials that harden after printing to strengthen
the object.

MATERIALS USED IN 3D PRINTING

In 3D printing, a variety of materials can be used to create different types of objects. The material
you choose depends on what kind of object you want to make and what properties the object
needs to have (like strength, flexibility or appearance).

Here are the most common materials used in 3D printing:
1. Plastic (PLA and ABS): There are two types of plastic material used in 3D printing as
mentioned below:

PLA (Polylactic Acid): PLA is an eco-friendly 3D printing material made from renewable
resources like corn starch and sugarcane. It’s easy to use, ideal for models and decorations,
but not suitable for heavy-duty objects due to its limited strength and heat resistance.

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