Before you can create your tech pack, you have to create something called a flat sketch, which is also known as a technical drawing or informally as a flat. This is because a pattern maker will then go in and use this sketch as a basis to create the pattern.
Explanation: Eastman Kodak created a camera and film development process in the late 1800s/early 1900s that made it possible for the public to take pictures on their own.