Welcome to the second episode of "Deep Dive with Colin." In this episode, Colin explores film positives and how important film density is in screen printing. Let's look at how different ink systems from various printers affect the quality of film positives.
THE IMPORTANCE OF DENSITY IN FILM POSITIVES
In the screen printing industry, getting a high-quality film positives is crucial. A good film positive stops light in the exposure unit, which is vital for making a precise stencil. Traditionally, the industry has stressed the need for the blackest black ink to make sure the film blocks UV light well. But is that always necessary? Colin examines this question.
THE ALL-BLACK INK SYSTEM
One popular solution is the Accuink system from Chromaline, which uses all-black ink cartridges. For example, the Canon printer with this system has five black ink cartridges. This setup is designed to produce very dense black prints, which are excellent for blocking UV light during the exposure process.
RELATED: HOW TO GET A DARKER FILM TRANSPARENCY FOR SCREEN PRINTING
CHEMICALLY ALTERED INK SYSTEMS
However, you don't always need an all-black ink system for good results. Chemically altered inks, like Epson's UltraChrome, contain UV blockers that stop light from passing through the film. This feature not only prolongs the life of prints exposed to sunlight but also makes sure the film stops UV light well during the screen exposure process.
RELATED: HOW TO RECYCLE SCREEN PRINTING FILM POSITIVES
REAL-WORLD EXAMPLE: EPSON P900
Colin has been using the Epson P900, which uses UltraChrome inks, for over two years. Even though the inks are lighter than those from an all-black system, the results are impressive. This printer excels in producing detailed prints with tiny dot sizes, perfect for high-end simulations and advanced designs. All the high-detail prints and designs shown in Ryonet videos were done using this Epson printer, showing its ability to deliver precise and high-quality film positives.
COMPARISON
Epson P900:
- Ink: Nine cartridges, which means higher replacement costs
- Benefits: Great for both photo and color printing, versatile for businesses wanting multi-functional printers
- Ink: All-black system, affordable and efficient
- Benefits: Budget-friendly, ideal for businesses focusing on cost-efficiency in film positive production
While the Epson offers better multi-functionality and high-end print quality, the Canon provides a cost-effective solution without losing the key aspects of film density.
CHOOSE BASED ON YOUR NEEDS
Both the Epson and Canon printers can produce high-quality films suitable for screen printing. The choice should depend on specific needs and budget. For those needing a versatile printer that also handles color printing, the Epson is a great option. For those focusing on budget, the Canon with an all-black system is a clear winner.
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Questions and topic suggestions can be submitted through the form. We look forward to helping viewers succeed in their screen printing journey. Stay tuned for the next episode of "Deep Dive with Colin."
