90GSM Sublimation Paper Wholesale

Metal sublimation transfer printing process：Core principle: Sublimation ink is in a gaseous state at high temperatures and can only be combined with polymer coatings (i.e. special treatment layers on metal surfaces), rather than with the metal itself.

1. Preparation of substrate: Metal products (such as aluminum plates, cups, keychains, plaques, etc.) must first undergo pre-treatment and be coated with a special thermal sublimation coating on their surface. This coating is the key to the success of transfer printing, as it is responsible for receiving gaseous ink.

2. Printing: Use sublimation ink to print a mirrored (reversed) pattern on metal transfer paper.

3. Transfer printing:

·Tightly adhere the Printed paper to the coated metal surface (usually fixed with high-temperature tape).

·Put it into a flat hot press or oven (for curved objects such as cups, a dedicated cup baking machine is required).

·Heat for a certain period of time (usually 60-120 seconds) under precise high temperature (usually 190-200 ° C) and high pressure (for flat plates).

·Ink sublimates into gas, penetrates paper fibers, and then reacts with the polymer coating on the metal surface, permanently curing.

4. Tear off: After heating, remove the item and tear off the transfer paper before or after cooling (depending on the coating type), and the pattern will be clearly presented on the metal surface.