What is four-color? Four-color refers to CMYK, which are the four basic colors we commonly know: cyan, magenta, yellow and black. Although it may seem like only a few colors, by mixing them you can basically produce most of the colors you encounter in daily life. For everyday use, there's no problem.
Six-color adds two transitional colors to the four-color base: light cyan and light magenta. The advantage of this is that the printed patterns are finer and the colors are more natural. The commonly mentioned grainy feel is significantly reduced, and the overall color gamut is wider and more vibrant.
Currently on the market, there is also an eight-color configuration, which adds light black and very light gray to the six-color base. As a result, the printed layers are more delicate, and the print effect is very smooth, with almost no visible graininess.
So which configuration should you choose? Here are two suggestions: First, if you are buying a small UV printer and the things you print on a regular basis don't have very high color requirements, then four-color is sufficient. Second, if you are considering an industrial machine, such as those with Ricoh printheads, then it depends on your business needs. If you frequently print portraits, light-colored patterns, or images on transparent materials, it is recommended to choose six-color. This will give you fuller colors and better details. Third, if you are doing very high-end customization, such as art paintings or high-value-added products, where the quality requirements are extremely high, then you should choose eight-color. In particular, Epson's eight-color configuration will deliver even better results.
In summary, which configuration to choose still depends on your actual product needs and your customers' requirements. It's best to visit the manufacturer in person, test print samples, and compare before making a purchase decision.