Have you ever wanted to 3D print a card and then just given up wondering… how do I sign this thing?! I’ve been there too! Traditional pens and markers don’t always play nice with the textured surface of a 3D print. But don’t worry—I’ve got a super easy solution that works every time: Mod Podge.
Yep, that classic crafting staple comes in handy for more than just decoupage. With just a thin layer, it creates a smooth finish on your 3D printed surface, making it perfect for writing names, heartfelt messages, or even adding a little hand-drawn flair.
How to Make Your 3D Printed Cards Writable
Here’s my quick step-by-step process to get that perfect writable finish:
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Design Your Card – Use Tinkercad to create your custom 3D card.
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Print Your Card – Choose any color filament and print like usual.
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Paint with Mod Podge – Apply a thin, even layer of mod podge https://amzn.to/3H84CTb across the surface where you want to write.
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Let It Dry – Wait 10–15 minutes for it to fully dry and set.
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Write Away! – Use an acrylic paint pens https://amzn.to/45e7g3N to add names, messages, or doodles.
Try It Out with Free 3D Card Files!
To help you get started, I’ve uploaded a few free printable 3D card designs on MakerWorld—so you can try out this Mod Podge trick right away without needing to design from scratch.
👉 Download Free Cards on MakerWorld
Want a Ready-to-Go Classroom Project?
If you’re looking to take this further with your students, I’ve created step-by-step Tinkercad card lessons for:
Birthday Cards
Mother’s Day Cards
Father’s Day Cards
Each lesson includes:
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Google Slides instructions for students
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Teacher guide
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Step-by-step tutorial video
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Brainstorming & design planning sheets
Perfect for STEM classes, fast finishers, or holiday-themed activities that combine design thinking, CAD skills, and creativity!
👉 Check out the full lesson collection on my website
Make Your Prints Personal
Using Mod Podge to add a writable finish has been a total game-changer in my 3D printing projects—and I know your students (and gift recipients!) will love the personal touch it adds.
Give it a try and tag me if you share your creations—I’d love to see what you come up with!
Happy Printing,
Allyn
Note: This post may contain affiliate links which don’t cost you anything, but helps me keep up the creativity!
