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Technical (Fashion) Design With Adobe Illustrator

The tutorials on this page are part of my free Ultimate Guide to Adobe Illustrator for Fashion. Click here to start from the beginning.

Not every “designer” in fashion works on the creative and conceptual side of the process.

Technical designers (AKA TDs) work with the hard numbers and constructing details that help turn creative designs into real garments.

Technical design is a super in-demand service to offer as a freelancer, and these skills also open up more traditional fashion jobs.

As a technical designer, you’ll use Illustrator for things like:

  • Turning color fashion flats into black and white tech sketches
  • Creating full scale (life size) mockups with measurements
  • Adding text callouts to spec the garment for a tech pack

A lot of the other tutorials in this guide will be helpful for you TD’s too. (Specifically the stuff on drawing since you’ll need to edit flats and create detail sketches to communicate with factories.)

And depending on  your freelance niche or the size of the brand you work for, you may do both creative design and TD.

So depending on what kind of work you do, you may find the next few tutorials helpful (or not). No hard feelings if you skip right past these.

How to Change a Color Fashion Flat Drawing to Black and White

Please. Please. Please. DO NOT manually change color fashion flats to black and white…one piece at a time. I’ve seen TOO many of you do this.

If your design is complex and has a lot of different shapes (zippers, buttons, etc.), repeating pattern fills, or brushes (zippers, coverstitching, etc.), this is INSANELY TEDIOUS.

Even if your design is somewhat simple (like the legging example in the next video), you still shouldn’t waste time by MANUALLY changing it to black and white.

Here’s a tutorial on how (in a few clicks) you can quickly take a color sketch and make it black and white in Illustrator:

How to Mockup and Spec Full Scale Measurements for Fashion Designs in Illustrator

You know what I like most about this tutorial? It includes some real life fun (AKA me being a nerd on screen)!

But no, really, you can step away from your screen for a minute and use your body (or a fit model or a friend’s body) to look at measurements in real life.

After you’ve done that (because there’s nothing like seeing something on an actual body), I’ll show you how to mockup your design (or artwork) in full scale and add measurements in Illustrator.

Here’s exactly how you do all of this:

How to Create Tech Sketches with Text Callouts in Illustrator (for tech packs)

It’s a TERRIBLE idea to create tech packs in Illustrator. Illustrator is meant for design, not for numbers and charts and math like you have in tech packs! But that doesn’t mean there aren’t PIECES and PARTS of your tech pack that you can create in Illustrator and then bring into Excel.

And yes, I’ll show you the best way to do that next.

(Don’t know how to create a tech pack? Or find your tech packs take FOREVER? I’ve got you! Check out my free guide. If you want more, my comprehensive course on tech packs, Design to Development, is available inside Freelance Accelerator.)

The first step to creating tech packs is by creating tech/technical sketches with text callouts.

I like to do this right in Illustrator, and I’ll show you the most efficient (and organized) way to do it in ONE Illustrator file.

I emphasize one because I knew a designer who would make MULTIPLE AI files for each design.

One file for the tech sketch.

One file for the colorways.

One file for the fabric map.

One file for the measurement specs.

And so on.

It was OUT OF CONTROL.

Because if ANYTHING on the sketch had to be updated, you had like a KAJILLION files to edit.

Which is why you should do it in ONE file.

And in this video tutorial, I’ll show you not only HOW to do that, but WHY it’s the best way:

How to Put Illustrator Sketches in Excel (for tech packs)

This may seem like a really RANDOM thing to make a tutorial on…so let me tell you why I did it.

For years, I fought with two problems when it came to getting Illustrator and Excel to “play nice with each other.”

  1. I could save my AI sketches as JPGs and place them in Excel. BUT it was a lot of steps. And if I made one TINY change to my sketch? I had to do the steps ALL OVER again. It was a PITA (Pain In The A$$).
  2. I also fought A LOT with getting the sketches clear enough and not all blurry (on screen or when printed) so the factory (and I!) could read them…while not creating an Excel file that was GINORMOUS.

And then one brilliant day, I figured out THE SOLUTION.

The BEST solution.

The EASIEST solution.

The MAGICAL solution.

I NEVER looked back.

Here’s a tutorial that shows you the quickest way to drop your AI tech sketches (or any other artwork) into Excel with sufficient resolution and a not too big file size. Yes, it’s the HOLY GRAIL you never thought existed.

Eat it up right here →

The tutorials on this page are part of my free Ultimate Guide to Adobe Illustrator for Fashion. Click here to start from the beginning.

Jump to more tutorials

The Illustrator Beginner’s Series

Fashion Sketches (AKA fashion flats)

Intuitively Draw Curved Lines

Recolor Your Designs & Create Colorways in Minutes

Repeating Patterns & Fabric Textures

Fashion Brushes (zippers, stitching, gathers, etc)


About the Author

Heidi {Sew Heidi}

With no fashion degree or connections, Heidi’s start in the industry was with her own brand. By her mid-20s, she had grown it to $40,000+ in revenue. Despite that ‘success,’ she was left broke and burnt. Next, she landed her dream fashion design job at a lifestyle brand in Denver, CO. But the toxic offices gave her too much anxiety. So, in 2009, she started her business as a freelance fashion designer. After a lot of trial and error (she literally made $0 in her first year!), she figured out how to find well-paying clients, have freedom in her day, and make money doing the work she loved in fashion. She grew her freelance business to $100,000+ a year working a comfortable 35 hours a week. In 2013, Heidi started Successful Fashion Designer. She has reached hundreds of thousands of fashion designers, TDs, PDs, pattern makers, and more around the world through her educational videos, podcast episodes, books, live trainings, and more. Heidi’s signature program, Freelance Accelerator: from Surviving to Thriving (FAST) has generated over $1 Million in revenue and helped almost 1,000 fashion designers escape toxic jobs and do work they love in fashion.

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