In the sublimation printing process, sublimation film serves as a crucial consumable that directly determines the printing effect, applicable consumables, and the overall texture of the finished product. Among them, five-sided sublimation film and single-sided film are the two most commonly used types in the current market. Although both belong to the category of films, they have fundamental differences in material, performance, and compatible consumables.
Below, we will comprehensively analyze the differences between the two from dimensions such as material, performance, and application, helping everyone clearly distinguish and make reasonable choices.
Material and Structure: Material Differences Determine Performance Variations
The material and coating structure of the film are the core foundations that determine its tensile properties and printing compatibility. The difference in this aspect between five-sided sublimation film and single-sided film is particularly significant, directly leading to variations in their subsequent application scenarios.
1, Five-Sided Sublimation Film: Excellent Elongation of Elastic Substrate
Five-sided sublimation film uses ultra-thin elastic PET as its core substrate, with a finished thickness ranging from 210-220μm. It boasts excellent elongation and flexibility, capable of stretching and contracting within a certain range without breaking—this is the key prerequisite for achieving five-sided printing.
From a structural perspective, the keycap film consists of a three-layer coating. This multi-layer coating design not only enhances the film’s toughness but also optimizes ink adhesion and transfer effects, ensuring that during the high-temperature sublimation process, the ink can be transferred uniformly and stably onto the keycap surface. Meanwhile, its elongation characteristic allows the film to closely adhere to the corners and curved surfaces of the keycaps, avoiding printing blank areas and providing a solid guarantee for full-coverage transfer.
2, Single-Sided Sublimation Film: Core Substrate Lacks Elongation Properties
Unlike five-sided sublimation film, the core substrate of single-sided sublimation film is BOPET, with a finished thickness of only 90μm—much thinner than five-sided sublimation film—and it completely lacks stretchability. Single-sided sublimation film consists of only two layers of coating, and its coating design focuses more on ink color development effect rather than stretch adaptability.
Product Performance: Difference in Elongation Properties Determines Printing Adaptability
If material and structure are the foundation, then elongation performance is the core indicator distinguishing the two. This difference directly determines whether they can adapt to the printing needs of different types of keycaps.
1, Five-Sided Sublimation Film: Excellent Elongation Adapts to Curved Surface Coverage
The most prominent advantage of five-sided sublimation film is its outstanding elongation and flexibility. This characteristic enables it to perfectly adapt to the five-sided printing needs of sublimation keycaps—not only covering the front of the keycap but also closely adhering to the front, back, left, and right four sides of the keycap, thus achieving full-coverage transfer.
During the printing process, the high-temperature vacuum environment causes the film to soften and wrap around the consumables, allowing its elongation property to be better utilized. It can fit perfectly with the corners and curves of the keycap. This strong elongation property also makes this film the exclusive consumable for printing sublimation keycaps.
2, Single-Sided Sublimation Film: No Elongation Limits It to Flat Surface Printing
Single-sided sublimation film lacks elongation property and cannot meet the fitting requirements of curved surfaces, so it is mainly suitable for the printing production of single-sided keycaps or MOA version single-sided keycaps.
Despite lacking elongation performance, the color expression of single-sided sublimation film is no less impressive than that of five-sided film. The transferred colors are equally vibrant and clear, able to accurately reproduce the designed patterns. In addition, the characteristics of its BOPET substrate make it more stable in flat surface printing, less prone to issues like deformation and wrinkling, with high printing precision and low scrap rate.
Choose Based on Needs: Compatibility Is Key
Five-sided sublimation film and single-sided film are essentially two materials designed for different printing needs, with no distinction in superiority or inferiority—only differences in compatible consumables.
1, If you pursue the aesthetics and texture of keycaps and need to achieve five-sided full-coverage transfer, then five-sided sublimation film is undoubtedly the best choice. Its elastic material, strong elongation, and three-layer coating design perfectly meet the production needs of high-end five-sided sublimation keycaps, delivering a superior visual experience.
(Example: Curved 3C accessories—use five-sided sublimation film for curved surfaces)
2,If you prioritize clear printing on the front of keycaps, seek high cost-effectiveness, or need to print on flat objects such as textiles, metals, and ceramics, then single-sided film has more advantages. Its lack of elongation gives it an edge in flat-surface printing, and its color expression is equally excellent.
What Advantages Do the Keycap Sublimation Films Produced by Prosub?
In the field of keycap films, the products of Prosub stand out with remarkable advantages:
The keycap films we produce use a high-performance stretchable APET material from Toray Korea as the substrate. This substrate not only retains the elasticity and flexibility of traditional films but also upgrades the elongation performance, meeting the strict requirements of five-sided sublimation printing for film elongation.
With its superior elongation performance, our keycap films can fit more tightly into the gaps of keycaps, ensuring uniform ink transfer. Currently, all domestic high-end keyboard suppliers choose the films produced by Prosub. The finished products printed with these films can meet the high-end aesthetic demands of players for keycaps, presenting a more three-dimensional and complete printing effect.
Meanwhile, the three-layer coating structure of the keycap films also enhances ink adhesion. The transferred colors are more durable and wear-resistant, meeting the long-term usage needs of professional players for high-end keyboards.
