Keycaps are crucial parts of any computer keyboard. Besides offering a comfortable typing experience, they provide a particular aesthetics which makes the keyboard unique and personalized. The keycaps can be eclectic, minimal, bold or trendy, depending on the preference of the individual. This article provides an illustrative overview of keycap printing materials and tools, discussing their applications, challenges and benefits.
Keycap Materials
ABS (Acrylonitrile Butadiene Styrene)
ABS Plastic keycaps are amongst the most widely used types given their durability and affordability. They are oil-resistant and available in various colors fulfilling different aesthetic needs. However, their major down side is that frequently touched ABS keycaps could wear down relatively quickly, resulting in a phenomenon known as “shine.”
PBT (Polybutylene Terephthalate)
PBT is another commonly used plastic for keycaps. They are renowned for their durability and resistance to shine. PBT keycaps are more textured and provide a firm grip. They are also resistant to heat and chemicals, making them a fitting choice for keyboard enthusiasts.
POM (Polyoxymethylene)
POM keycaps, also known as ‘doubleshot’ keycaps, are quite similar to PBT keycaps in terms of their durability and their resistance to wear and shine. They possess a unique slippery feel. However, POM keycaps are not as widely used or readily available as ABS and PBT keycaps.
PC (Polycarbonate)
Polycarbonate keycaps are popular for their clear, translucent appearance. Boasting excellent dimensional stability and crystal-clear transparency, Polycarbonate is popularly used to create visually captivating keyboards. However, it is often combined with other materials such as ABS for better printing results.
Each of these four materials has unique characteristics that make them suitable to specific user preferences and budgets. When it comes to the ideal choice, there isn’t one that fits all; it’s entirely dependent on the specific demands of the user and the type of keyboard they’re aiming to build or personalize.
Keycap Printing Methods and Tools
Pad Printing
Pad Printing is the standard method used by most keyboard manufacturers due to its cost-efficiency, color choices and speed. This method involves transferring an image from a photopolymer plate to the keycap surface using a silicone pad. One of the potential downsides of this method is that the printed letters and symbols tend to wear off after prolonged use.
Laser Etching
Laser Etching is a modern technique where lasers burn the surface of the keycap, creating a permanent marking. They are durable and won’t fade away with time. These etchings can be filled with color for better visibility. However, this process can only be used with certain materials and doesn’t work well with ABS.
Double-shot Molding
Double-shot molding is considered the gold standard for keycap printing due to its longevity. It involves injecting two layers of plastic into a mold. The first injection forms the legends (numbers, letters, and symbols), and the second forms the keycap itself. The resultant keycaps are durable and resistant to wear.
Dye-sublimation
Dye-sublimation involves heating a special type of ink until it converts from a solid to a gas and bonds with the keycap surface. The outcome is almost as permanent as double-shot molding. It’s a choice method for PBT keycaps which are resistant to high temperatures. However, this process is generally slower and more expensive than the other methods.
When it comes to the tools for keycap printing, there are a few essentials to consider.
Keycap Mould
A keycap mould is necessary for anyone creating custom keycaps or double-shot molding. The mold captures your keycap design, enabling plastic injections to create precise and accurate keycaps.
Printing Pads
Printing pads, specifically silicone pads, are necessary for pad printing. They are used to pick up the desired image from the plate and transfer it onto the keycap.
3D Printer
A 3D printer is a versatile tool in keycap production. It can be used to create unique, custom designs or prototypes before moving into large-scale manufacturing.
Laser Etching Machine
For the laser etching method, a laser etching machine is essential. It uses lasers to engrave or mark the surface of the keycaps, creating visible and durable symbols.
Heat Press Machine
A heat press machine is necessary for the dye-sublimation method. It applies heat and pressure to transfer the dye into the keycap material for a robust finish.
All these materials and tools contribute to the quality of keycap printing. The perfect combination results in a sturdy, durable, and stylish keyboard that can truly enhance the overall typing experience and aesthetic appeal. Regardless of whether you’re building a keyboard from scratch, or simply looking to replace worn-out keycaps, taking the time to understand the materials, tools, and printing methods can help ensure a successful project.
