Heat printing on apparel seems to be an easy job when the object is a classic cotton white t-shirt. You just need a classic plastisol transfer with no additional properties and the job flows easily. However, sometimes there are occasions that could make your production tough and frustrating. One of these cases is the bleeding/migrating (or even called sublimating) apparel
Maybe you have experienced that when you applying the transfer on your apparel and later find out that the color of the print has changed. Moreover, this migrating process could occur even after a couple of days after the heat pressing. So, this might become a real problem if your client calls you and tell you that the print has changed its colors. Of course, there is a solution for this by making the transfer with subli-protection layer which makes a “wall” between the print and the apparel’s surface. That protects the color inside the fabric to migrate over the print. The solution is easy, but the more important part is actually to find out that the apparel is problematic
How to discover that? It’s simple. Just make a test before the transfer order. You could pick up one classic opaque transfer and try it on the cloth you are planning to print. It’s better to make the test if the apparel contains a high percentage of polyester, polyamide, and other artificial fabrics. If it’s cotton only, you could lightly skip that part
The sign that your apparel is migrating it’s the changed color of the print. You could also notice that it looks like that the opacity of the print is too low. Like the print is almost transparent. Sometimes that could happen on the next or the very next day. Therefore, it’s recommended to wait a bit before you decide if you should purchase the subli-protect transfer.
Check out the picture. You could see that the white letters are bleeding over the red and black color of the sport t-shirt.