Printing is a highly specialized and skill-intensive field, requiring press operators to master operational procedures thoroughly while also understanding the machine's internal structure and drive mechanisms. However, due to constraints in funding and facilities, many educational institutions can only provide a limited number of training and demonstration machines, most of which are outdated models. This situation has, to some degree, compromised the quality of printing education. The author argues for the necessity of introducing virtual simulation technology into printing curricula and proposes practical application strategies for its implementation.

As the nation places increasing emphasis on the development of vocational education, the scale of such programs has expanded significantly, playing a positive role in improving the structure of vocational training and serving economic and social needs. At the same time, however, the current state of equipment and instructional resources in many technical schools remains less than ideal. There is a shortage of qualified "dual-qualified" instructors (those with both teaching credentials and industry experience), quality assurance systems are underdeveloped, and teaching methods and institutional mechanisms are in urgent need of reform—all of which seriously hinder the growth of vocational education.

Strengthening the construction of training center facilities and ensuring adequate hands-on practice time are essential prerequisites and guarantees for meeting student learning objectives. Consequently, many schools have increased investment in both equipment and training management, establishing training labs and training bases to provide basic support for practical instruction. Nevertheless, due to budget limitations, slow equipment replacement, space constraints, and rising enrollment, many institutions still face challenges such as overstretched training resources and insufficient practice opportunities for students. This, in turn, diminishes students' hands-on abilities and their competitiveness in the job market. Therefore, in addition to traditional equipment investments, schools should make full use of modern information technology to develop virtual factories and virtual workshops, leveraging virtual technologies to address current training deficiencies.

Major Problems in Printing Practical Training Instruction

1. Limited variety, outdated models, and obsolete equipment. A prominent issue in printing schools is poor hardware conditions. Most institutions suffer from severe funding shortages, yet a single domestic four-color offset press can cost hundreds of thousands or even millions of yuan—far beyond the reach of most schools. As a result, per-student equipment availability is low and the equipment is of substandard quality. Consequently, many lab sessions simply cannot be conducted; even when they are, the insufficient number of machines fails to meet students' hands-on needs. Moreover, schools typically use equipment until it reaches the end of its service life, while production companies upgrade their machinery much more rapidly. Graduates thus find it difficult to quickly adapt to workplace demands upon hiring. This falls far short of the Ministry of Education's requirement that "training base equipment should remain on par with current production equipment used in enterprises, and ideally maintain a certain degree of forward-looking capability."

2. High training costs, leading to perfunctory practical sessions. Although the state has increased funding for vocational education and some institutions have acquired imported multicolor offset presses, the high cost of consumables such as ink and paper often forces training to be carried out only superficially.

3. Inconsistency between on-campus training environments and actual production settings. Because printing equipment comes in many specifications and models, schools generally can only afford one type—often a lower-tier model within its class. The pace of equipment renewal lags far behind that of real production sites. This lack of variety and obsolescence means that even after completing lab work, students are not exposed to environments or job tasks that match professional practice, resulting in poor training outcomes and a slow transition to the workforce.

Understanding Virtual Reality Technology

Virtual reality (VR) technology uses computers to comprehensively simulate the real world. Because it can create environments closely resembling actual settings, it meets the needs for contextualized learning and natural interaction, giving it immense application potential in education. It is foreseeable that VR will become the next "star" technology in education, following multimedia and computer networks.

VR technology employs 3D modeling to construct virtual three-dimensional scenes that are identical or similar to real-world objects and environments, and it responds to user inputs with corresponding actions. Key VR technologies include dynamic environment modeling, real-time 3D graphics generation, stereoscopic display, and sensor technologies. VR primarily focuses on simulating the physical characteristics of real objects—often referred to as visual simulation.

A virtual training base built with VR technology features virtual "equipment" and "components" that can be generated on demand, allowing curricula to be continuously updated so that practical training keeps pace with technological advances. Moreover, VR's immersive and interactive nature enables students to assume roles within the virtual learning environment and fully engage, which greatly facilitates skill acquisition. Since virtual training systems pose no physical danger, students can practice repeatedly without risk until they master the required operations. For example, in a virtual flight training system, trainees can repeatedly operate controls and learn to take off and land under various weather conditions, achieving proficiency through repetition.

Conventional VR—requiring mainframe computers, head-mounted displays, data gloves, CAVE systems, sealed chambers, and other costly equipment—is beyond the budget of most educational institutions, severely constraining VR research and application in education. However, with rapid technological progress, VR has diversified. Based on the degree of "immersion," four types of VR can be distinguished, among which desktop VR is relatively simple, cost-effective, and widely applicable in education. Desktop VR uses personal computers and low-end workstations for simulation, with the computer screen serving as a window into the virtual world. Various input devices—including mice, trackballs, and force balls—enable full interaction with the virtual environment. Users observe a 360-degree virtual scene through the screen and manipulate objects within it, though they lack full immersion due to interference from the surrounding physical environment. The main drawback of desktop VR is the lack of true immersive experience, but its lower cost makes it broadly viable for educational use. On the software side, many mature platforms are available for developing desktop VR systems, such as Multigen VegaPrime, EON Studio, Virtools, VRML, and others.

The Role of Virtual Technology in Printing Education

In printing machinery instruction, extensive visualization of machine appearance, composition, and structure is required. Traditional teaching relies heavily on physical display models or production prototypes. VR-based display methods offer clear advantages: low cost, no space limitations, and excellent visual quality.

• Relieves pressure caused by equipment shortages and obsolescence. A virtual printing workshop can provide a full range of training equipment models that never wear out, and it can be continuously expanded and upgraded through software maintenance. With a VR system, students can perform a wide variety of training exercises without leaving the classroom, gaining experiential learning comparable to real practice, enriching their sensory understanding, and deepening comprehension of course material.

• Saves significant capital investment. Using virtual workshops as a complement to actual training allows students to engage in unlimited theoretical study and operational practice at no additional cost in materials or wear and tear. This drastically reduces consumption of paper, ink, and machine maintenance, lowering overall training expenses.

• Eliminates risks associated with real training or operation. Given the complexity and precision of printing presses, students inevitably face risks of injury and machine damage due to misoperation during hands-on practice. In a virtual environment, however, students can safely perform all kinds of exercises with minimal danger, reducing personal injury and equipment damage to near zero.

Proposed Application Plan for VR in Printing Education

1. Building simulation models. First, model the printing workshop and the external structures of printing machinery. Use 3D authoring tools such as 3ds Max, Maya, and MultiGen Creator. 3ds Max and Maya offer powerful modeling capabilities and rich detail, ideal for fine modeling, but they generate large data volumes. MultiGen Creator, designed specifically for real-time complex scene navigation, is developed by the same company as Vega and integrates seamlessly with Vega. It features a user-friendly interface, fast modeling, and produces smaller file sizes that do not compromise real-time performance, though it lacks the fine-detailing capability of the aforementioned tools.

   Second, model the main internal drive mechanisms of printing presses. Use mechanical CAD software such as Pro/E and SolidWorks to create gears, cams, levers, and other mechanical parts, and assemble them accordingly.

2. Creating the virtual printing workshop scene. Import the models into visual simulation software such as VegaPrime or EON Studio to build a virtual printing workshop.

3. Establishing interactivity with the virtual workshop. This includes free navigation through the workshop, visual display and disassembly of press components, dynamic simulation of drive mechanisms with linked videos and animations, and basic virtual press operations via a virtual control panel.

   For display of equipment appearance and structure, use EON for motion editing and driving; for more complex interactive machine operation simulations, use VegaPrime; for logic control of the virtual panel, employ programming languages such as VC++.

4. System integration. Integration involves assembling the models and scenes into a cohesive, standardized instructional software package. Common development platforms like VB and VC++ can be used. Since VR driver software such as EON and VegaPrime provide ActiveX controls compatible with these platforms, integration is straightforward. During programming, developers need only focus on functional layout and ensure compatibility among modules.

Today, printing education should no longer rely solely on textbooks and lectures. By leveraging VR technology as an advanced platform, we can develop a virtual simulation teaching system tailored to practical teaching needs, thereby compensating for the shortcomings of traditional methods. It is hoped that this approach will alleviate the difficult circumstances faced by many printing schools, elevate their teaching quality to a new level, and contribute to the cultivation of skilled talent for the printing industry.

(Author affiliation: Tianjin University of Science and Technology)