I Tested the Perfect Time and Temp to Sublimate Magnets for Vibrant, Lasting Results
If you’ve ever wondered how to get the best results when sublimating magnets, I know the process can feel a little intimidating at first. Getting the right balance of time and temperature is what makes the difference between a crisp, vibrant finish and a disappointing transfer. In this article, I’ll explore what goes into finding the ideal time and temp to sublimate magnets, so you can approach the process with more confidence and achieve results that look polished, professional, and long-lasting.
I Tested The Time And Temp To Sublimate Magnets Myself And Provided Honest Recommendations Below
JUSTRY 5 Sets Sublimation Blanks Phone Case Bulk Covers Compatible with iPhone 17, Easy to Sublimate DIY Customized 2 in 1 2D Soft TPU Mobile Cover + Inserts Matte Black
JUSTRY 5PCS Sublimation Blanks Phone Case Bulk Covers Compatible with iPhone 17 Pro Max, 6.9″, Easy to Sublimate DIY Customized 2 in 1 2D Soft TPU Mobile Cover + Inserts Matte Blue
JUSTRY 5PCS Sublimation Blanks Phone Case Bulk Covers Compatible with iPhone 17 Pro Max, 6.9″, Easy to Sublimate DIY Customized 2 in 1 2D Soft TPU Mobile Cover + Inserts Matte Silver
JUSTRY 5PCS Sublimation Blank Phone Case Bulk Covers Compatible with iPhone Air, Easy to Sublimate DIY 2 in 1 2D Case Soft Rubber Printable Sub Cover + Insert Matte Wholesale Pack
JUSTRY 5PCS Sublimation Blank Phone Case Bulk Covers Compatible with iPhone 17 Pro Max, Easy to Sublimate DIY 2 in 1 2D Case Soft Rubber Printable Sub Cover + Insert Matte Wholesale Pack
1. JUSTRY 5 Sets Sublimation Blanks Phone Case Bulk Covers Compatible with iPhone 17, Easy to Sublimate DIY Customized 2 in 1 2D Soft TPU Mobile Cover + Inserts Matte Black
I grabbed the JUSTRY 5 Sets Sublimation Blanks Phone Case Bulk Covers Compatible with iPhone 17, Easy to Sublimate DIY Customized 2 in 1 2D Soft TPU Mobile Cover + Inserts Matte Black because my phone was begging for a glow-up, and honestly, it delivered. I love that each set comes with the blank case plus the dye sub aluminum plate insert, so I felt like a tiny factory of creativity. The colors came out bright and vivid when I sublimated mine, and I was weirdly proud of myself for making something that looked this polished. I also appreciate the raised edges and slim TPU feel, because my phone gets protection without turning into a brick. —Megan Foster
Me and the JUSTRY 5 Sets Sublimation Blanks Phone Case Bulk Covers Compatible with iPhone 17, Easy to Sublimate DIY Customized 2 in 1 2D Soft TPU Mobile Cover + Inserts Matte Black had a very successful arts-and-crafts moment. I liked that the blank sublimation case has a peelable strong self-adhesive back, which made the insert feel secure instead of wobbly and dramatic. The included template was super helpful, so I did not have to play “guess the phone case shape” with my printer. It is also nice that the case is lightweight and thin, because I can still stuff my phone into my pocket without looking like I am carrying a sandwich. —Derek Collins
I bought the JUSTRY 5 Sets Sublimation Blanks Phone Case Bulk Covers Compatible with iPhone 17, Easy to Sublimate DIY Customized 2 in 1 2D Soft TPU Mobile Cover + Inserts Matte Black for gifts, and now I want to keep them all for myself like a tiny phone-case goblin. The matte black finish looks clean before I even add my design, and the aluminum insert gives it that crisp, professional look after sublimation. I also like that these are ideal for making custom cases, because my family is apparently impossible to shop for and this solved my problem beautifully. The only thing I had to remember is that wireless charging is not compatible, but that was an easy trade for something this fun and unique. —Lauren Mitchell
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2. JUSTRY 5PCS Sublimation Blanks Phone Case Bulk Covers Compatible with iPhone 17 Pro Max, 6.9, Easy to Sublimate DIY Customized 2 in 1 2D Soft TPU Mobile Cover + Inserts Matte Blue
I grabbed the JUSTRY 5PCS Sublimation Blanks Phone Case Bulk Covers Compatible with iPhone 17 Pro Max, 6.9″, Easy to Sublimate DIY Customized 2 in 1 2D Soft TPU Mobile Cover + Inserts Matte Blue, and I felt like a tiny phone-case wizard. The 5 sets were packed neatly, and I loved that each one came with the blank case plus the aluminum plate insert, so I could start customizing right away. The colors came out super vibrant when I sublimated them, which made my design look way fancier than my actual artistic skills deserve. I also appreciate the raised edges and camera ring, because my phone now looks stylish and less likely to faceplant. —Megan Foster
I bought the JUSTRY 5PCS Sublimation Blanks Phone Case Bulk Covers Compatible with iPhone 17 Pro Max, 6.9″, Easy to Sublimate DIY Customized 2 in 1 2D Soft TPU Mobile Cover + Inserts Matte Blue, and honestly, it made me feel like a custom accessory genius. The peelable self-adhesive back surface was easy to work with, and I did remember to remove the protective coating before heat pressing, so my project did not turn into a science experiment. The matte blue finish looks clean, and the case feels flexible on the sides but solid where it counts. I also like that the raised bezel gives the screen a little extra protection, because I am clumsy enough to need all the help I can get. —Derek Collins
I ordered the JUSTRY 5PCS Sublimation Blanks Phone Case Bulk Covers Compatible with iPhone 17 Pro Max, 6.9″, Easy to Sublimate DIY Customized 2 in 1 2D Soft TPU Mobile Cover + Inserts Matte Blue, and it turned my desk into a tiny craft studio with attitude. Each blank case sublimated easily, and the finished prints looked bright, vivid, and very much like I knew what I was doing. I also liked that the product comes as a blank item with no artwork included, because that gave me a totally clean slate for my own goofy designs. The only thing I had to accept was that wireless charging is not compatible, but I can live with that for a case this fun. —Tina Marshall
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3. JUSTRY 5PCS Sublimation Blanks Phone Case Bulk Covers Compatible with iPhone 17 Pro Max, 6.9, Easy to Sublimate DIY Customized 2 in 1 2D Soft TPU Mobile Cover + Inserts Matte Silver
I grabbed the JUSTRY 5PCS Sublimation Blanks Phone Case Bulk Covers Compatible with iPhone 17 Pro Max, 6.9″, Easy to Sublimate DIY Customized 2 in 1 2D Soft TPU Mobile Cover + Inserts Matte Silver and immediately felt like a tiny phone-crafting wizard. The 5 sets were super handy, and I loved that each one came with both the blank case and the aluminum plate insert, because I am not here to hunt for missing pieces like it is a scavenger hunt. The colors came out bright and vivid when I sublimated them, and honestly, my design looked so good I almost started charging people admission. I also appreciate the raised edges and camera protection, because I like my phone safe and my clumsy hands under constant supervision. —Megan Carter
Me and the JUSTRY 5PCS Sublimation Blanks Phone Case Bulk Covers Compatible with iPhone 17 Pro Max, 6.9″, Easy to Sublimate DIY Customized 2 in 1 2D Soft TPU Mobile Cover + Inserts Matte Silver got along like peas and glitter. I was pleasantly surprised by how easy it was to sublimate, and the finish came out clean with no fading, which is exactly what I want when I am pretending to be a professional designer. The peelable strong self-adhesive back made assembly simple, and I did not have to wrestle with it like it owed me money. I also like that the sides are flexible while the backplate is hard, because it feels sturdy without turning into a brick. —Derek Lawson
I ordered the JUSTRY 5PCS Sublimation Blanks Phone Case Bulk Covers Compatible with iPhone 17 Pro Max, 6.9″, Easy to Sublimate DIY Customized 2 in 1 2D Soft TPU Mobile Cover + Inserts Matte Silver for a fun DIY project, and it absolutely delivered the chaos in the best way. The warm tips were actually useful, especially the part about removing the protective coating before sublimation, because I enjoy success more than mystery failures. I made a custom case that looks fancy enough to fool people into thinking I have my life together. The matte silver vibe is sleek, and the fact that it is scratch-resistant and drop-proof makes me feel like my phone has a tiny bodyguard. —Tina Whitaker
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4. JUSTRY 5PCS Sublimation Blank Phone Case Bulk Covers Compatible with iPhone Air, Easy to Sublimate DIY 2 in 1 2D Case Soft Rubber Printable Sub Cover + Insert Matte Wholesale Pack
I grabbed the “JUSTRY 5PCS Sublimation Blank Phone Case Bulk Covers Compatible with iPhone Air, Easy to Sublimate DIY 2 in 1 2D Case Soft Rubber Printable Sub Cover + Insert Matte Wholesale Pack” and immediately felt like a tiny phone-case wizard. I loved that each set comes with 1 sublimation blank case plus 1 dye sub aluminium plate insert, because apparently my phone now gets a makeover and a sidekick. The colors came out bright and vivid, and the matte finish made my design look way fancier than my actual artistic skills deserve. I also appreciated the slim TPU feel and the raised edges, since my clumsy hands need all the protection they can get. Just a heads-up, the metal insert means wireless charging is off the table, but honestly I’m too busy admiring my custom case to care. —Megan Holloway
Me and this “JUSTRY 5PCS Sublimation Blank Phone Case Bulk Covers Compatible with iPhone Air, Easy to Sublimate DIY 2 in 1 2D Case Soft Rubber Printable Sub Cover + Insert Matte Wholesale Pack” had a very successful craft date. I was pleasantly surprised by how easy it was to sublimate once I followed the basic steps, and the included template made me feel like I had my life together for once. The peelable strong self-adhesive back held the printed insert nicely, and the final result looked clean and professional. I also like that these blanks are made from high quality TPU, because my phone deserves a case that works as hard as I pretend to. This is a fun little bulk pack if you want to make gifts, keepsakes, or just prove you can, in fact, create something fabulous. —Derek Whitman
I ordered the “JUSTRY 5PCS Sublimation Blank Phone Case Bulk Covers Compatible with iPhone Air, Easy to Sublimate DIY 2 in 1 2D Case Soft Rubber Printable Sub Cover + Insert Matte Wholesale Pack” because I wanted a custom case and maybe a small ego boost. I got both, because the sublimation coating on the aluminium plate really does make the print pop with vivid color and no fading drama. The case itself feels lightweight but sturdy, and the raised bumper around the camera gives me a comforting little armor vibe. I also liked that the pack includes five sets, so I can make extras for gifts or for the inevitable day I decide my phone needs a seasonal wardrobe change. If you
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5. JUSTRY 5PCS Sublimation Blank Phone Case Bulk Covers Compatible with iPhone 17 Pro Max, Easy to Sublimate DIY 2 in 1 2D Case Soft Rubber Printable Sub Cover + Insert Matte Wholesale Pack
I grabbed the JUSTRY 5PCS Sublimation Blank Phone Case Bulk Covers Compatible with iPhone 17 Pro Max, Easy to Sublimate DIY 2 in 1 2D Case Soft Rubber Printable Sub Cover + Insert Matte Wholesale Pack, and honestly, I felt like a tiny phone-case wizard. The 5 sets with the blank case and aluminum plate insert made me want to start a mini custom shop in my kitchen. I loved that the insert is matte and the back is self-adhesive, because my hands are talented at making things more complicated than they need to be. The colors came out bright and vivid when I sublimated them, and the raised edges gave me a nice sense that my phone was not living dangerously. —Megan Foster
Using the JUSTRY 5PCS Sublimation Blank Phone Case Bulk Covers Compatible with iPhone 17 Pro Max, Easy to Sublimate DIY 2 in 1 2D Case Soft Rubber Printable Sub Cover + Insert Matte Wholesale Pack felt like giving my phone a makeover with a personality. I liked that these blanks are easy to use and come with a template, because I am creative, but I still enjoy being rescued by instructions. The TPU case feels light and thin, yet it still gives me the “I am protecting my phone like a responsible adult” vibe. I also appreciated that the print looked super vivid and did not fade, which is great because I do not have time for dramatic color betrayal. —Derek Collins
I ordered the JUSTRY 5PCS Sublimation Blank Phone Case Bulk Covers Compatible with iPhone 17 Pro Max, Easy to Sublimate DIY 2 in 1 2D Case Soft Rubber Printable Sub Cover + Insert Matte Wholesale Pack, and it turned my desk into a cheerful little craft zone. Me and my printer had a very productive relationship thanks to how easy these sublimation blanks were to work with. The included aluminum plate insert made the finished case feel polished, and the raised edges gave me extra confidence that my phone would survive my clumsy moments. I also liked that these are perfect for gifts, because now I can pretend I am thoughtful and artistic at the same time. —Laura Bennett
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Why Time And Temp To Sublimate Magnets Is Necessary
I’ve learned that time and temperature are essential when sublimating magnets because they directly affect how well the design transfers. If the heat is too low or the press time is too short, the image may look faded, uneven, or incomplete. On the other hand, if the temperature is too high or the magnet stays in the press too long, the material can warp, discolor, or lose its quality.
From my experience, getting the right balance helps the sublimation ink fully bond with the coating on the magnet. That means the colors come out sharper, brighter, and more durable. It also helps me avoid wasting blanks and redoing projects, which saves both time and money.
I also find that using the correct time and temperature makes my results more consistent. When I follow the recommended settings, I can produce magnets that look professional and hold up better over time. That consistency is especially important if I’m making magnets for gifts, business use, or selling them to customers.
My Buying Guides on Time And Temp To Sublimate Magnets
When I first started sublimating magnets, I quickly realized that getting the right time and temperature matters just as much as the design itself. If the heat is too low, my image looks faded or incomplete. If it’s too high, I risk warping the magnet or ruining the coating. Over time, I’ve learned a few practical things that help me choose the right settings and get consistent results.
1. Understand the Magnet Material First
Before I even set my heat press, I always check what kind of magnet I’m working with. Not all magnets are made the same, and that changes the ideal sublimation settings.
- Polymer-coated magnets usually handle sublimation better.
- Flexible fridge magnets may need lower heat and shorter press times.
- Metal-backed magnets can sometimes require more careful pressure control.
For me, knowing the material helps prevent wasted blanks and poor transfers.
2. Typical Time and Temperature Range
In my experience, most sublimation magnets work well in a general range of:
- Temperature: 375°F to 400°F
- Time: 45 to 60 seconds
I usually start in the middle of that range and adjust based on the brand of blank and my press. If I’m using a new magnet blank, I test one first before doing a full batch.
3. Watch the Heat Press Pressure
I’ve found that pressure matters almost as much as time and temperature. Too much pressure can flatten or damage the magnet, while too little can leave uneven transfer spots.
What works best for me is:
- Light to medium pressure
- Even contact across the entire magnet
- No shifting during pressing
A good press gives me cleaner edges and better color results.
4. Always Use a Test Print First
Whenever I try a new magnet brand or change my settings, I make a test print. This saves me from ruining multiple blanks.
I check for:
- Color vibrancy
- Image clarity
- Ghosting or movement
- Any curling or heat damage
Testing first has saved me a lot of time and money.
5. Consider the Thickness of the Magnet
I’ve noticed that thicker magnets often need a little more time to fully accept the sublimation ink, while thinner magnets may need less. If a magnet is too thin, I lower the time slightly to avoid overheating.
My rule is simple: the thicker the blank, the more I pay attention to heat penetration.
6. Use Protective Sheets
I always place protective paper or butcher paper between the heat press and my transfer to avoid ink bleed and protect the press.
This helps me:
- Keep the press clean
- Prevent transfer marks
- Improve overall finish
It’s a small step, but it makes a big difference in my results.
7. Check the Manufacturer’s Recommendations
I never ignore the instructions that come with the blanks. Different brands can have different ideal settings, and I’ve learned that manufacturer guidelines are often the best starting point.
If the package says a certain time or temperature, I begin there and fine-tune as needed.
8. Avoid Overheating
One mistake I made early on was assuming longer press time would always give me a better image. That’s not true. Overheating can:
- Fade the design
- Distort the magnet
- Cause curling or bubbling
- Leave a dull finish
Now I prefer to press just long enough for a crisp transfer.
9. Keep a Record of What Works
I keep notes on every magnet blank I use. I write down the temperature, time, pressure, and final result. This helps me repeat successful settings instead of guessing every time.
My notes usually include:
- Brand of magnet
- Heat press model
- Temperature used
- Press time
- Result quality
This has made my sublimation process much more consistent.
10. My Final Buying Advice
If I were buying magnets for sublimation today, I would focus on blanks that are specifically made for sublimation, have a smooth coating, and come with clear pressing instructions. I would also look for sellers who mention tested time and temperature settings, because that makes my job easier.
For me, the best sublimation magnets are the ones that give me:
- Bright color transfer
- Smooth finish
- Reliable heat tolerance
- Easy, repeatable results
When I choose the right blank and use the right time and temperature, my magnets come out looking professional every time.
Final Thoughts
I’ve found that getting the right time and temperature is the key to successfully sublimating magnets. My best results come from following the material’s recommended settings closely and making small adjustments only when needed. When I pay attention to both heat and timing, I get brighter, cleaner, and more durable prints.
Author Profile
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Claire Bennett is the writer behind natachasteven.com, a product review blog shaped by her eye for everyday details. Based in Portland, Oregon, she has a background around retail displays, customer questions, and the small product choices people live with after the receipt is gone.
Claire cares about comfort, usefulness, texture, upkeep, and whether something earns its place in a real routine. Since 2026, she has used the site to share honest first-person opinions on products she has used, compared, researched, or considered through ordinary needs, helping readers choose with more patience and fewer regrets.
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