All About Custom Keycaps Dye Sublimation Technique - Goblintechkeys

All About Custom Keycaps Dye Sublimation Technique

Keycap dye sublimation is the latest method used to create long-lasting, high-quality legends on keycaps for mechanical keyboards. This process involves printing the desired design or characters onto the keycap using a special dye-sublimation ink, which chemically bonds with the keycap material when heated. The result is a durable, wear-resistant legend that won't fade or chip over time.


The Process of Keycaps Sublimation:

Here's an overview of the keycap dye sublimation process:

dye sub custom keycap images
  • Design preparation: The desired legend, which could be a character, symbol, or pattern, is designed using graphic design software. The design is then printed in mirror image onto a heat-resistant transfer paper using dye-sublimation ink.
  • Keycap preparation: The keycaps are made from a material called PBT (Polybutylene Terephthalate), which is known for its durability, resistance to shine, and compatibility with the dye sublimation process. The keycaps are cleaned and prepared for the dye-sublimation process.
  • Framing & Vacuum: The keycaps are placed on a tray, followed by the transfer paper. They will be properly aligned before going through the vacuum process. The vacuum process removes all the air between the frames, making sure there’s no gap between the transfer paper & keycaps.



  • Heat transfer: The frame is then placed in a heat press. The heat press applies consistent heat and pressure to the keycap and transfer paper. The heat causes the dye-sublimation ink to turn into a gas, which then penetrates and bonds with the keycap material. The temperature is usually set between 350-400°F (175-205°C), depending on the specific materials and inks used. The heat press maintains this temperature and pressure for a predetermined period, typically around 30 seconds to a few minutes.
  • Cooling and finishing: After the heat transfer process is complete, the keycap is allowed to cool, which solidifies the dye and creates a permanent bond between the legend and keycap. The finished keycap features a high-quality, wear-resistant legend that is smooth to the touch and visually appealing.



The Mechanism of Dye-Sublimation

As the dye particles are heated, they bypass the liquid state and directly sublimate into the gas state.  The term "sublimated dye" or "dye vapor" is commonly used to refer to the dye in its gaseous form during the dye-sublimation process. The gas consists of the same dye molecules that were initially in the solid ink. The high temperature and pressure cause the gas molecules to penetrate the keycap's surface, which is typically made of a porous material like PBT (Polybutylene Terephthalate).

During the process, the dye molecules infuse into the keycap material and bond with it at a molecular level. This chemical bond ensures a high degree of durability, as the design becomes an integral part of the keycap material rather than just a surface layer.


Dye Sublimation is The Choice

Keycap dye sublimation offers several advantages over other keycap printing methods, such as pad printing or laser etching. The dye-sublimation process results in a high-quality, durable legend on the keycap that is resistant to wear, fading, and chipping over time. The ability to create intricate designs and vibrant colours, combined with the durability of the process, makes dye-sublimation a popular choice for customizing keycaps on mechanical keyboards.

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