FEP vs ACF 3d Printer Accessories: Which Should You Buy?
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When choosing between FEP vs ACF 3d printer accessory options, you need to match the film type to your hardware. Both products serve resin printing, but they differ in construction and performance. The first is a complete metal tank with a pre-installed FEP film. The second is a pack of standalone ACF release liners. Each solution offers distinct advantages for print quality and speed depending on your printer model.
Key differences
| Aspect | ELEGOO Saturn 2 and 3 Metal Resin Tank with FEP | ELEGOO Saturn 3 Ultra ACF Film 3-Pack |
|---|---|---|
| Release Film Type | FEP | ACF |
| Product Form | Metal resin tank with pre-installed film | Standalone film pack (3 pieces) |
| Film Thickness | Not listed | 0.3mm |
| UV Transmittance | Not listed | 92% |
| Material Construction | Anodized aluminum vat | Composite film |
Which one should you choose?
Choose ELEGOO Saturn 2 and 3 Metal Resin Tank with FEP if
- You own an Elegoo Saturn 2 or Saturn 3 and need a complete replacement vat.
- You prefer a durable metal container that protects the film and resin from UV light.
- You want a pre-assembled unit with the release film already installed for immediate use.
Choose ELEGOO Saturn 3 Ultra ACF Film 3-Pack if
- You use an Elegoo Saturn 3 Ultra and require faster printing speeds with RAPID resin.
- You value high UV transmittance for accurate and efficient curing.
- You want a composite film that resists sticking and prevents bubbles or scratches.
Verdict: Choose the metal tank with FEP film if you need a robust, all-in-one vat for Saturn 2 or 3 printers. Select the ACF film pack if you have a Saturn 3 Ultra and prioritize faster print times and higher UV transparency. Your decision depends entirely on your specific printer model and desired print speed.
FEP Tank vs ACF Film Specs
Release film type
Product A uses standard FEP release film, which is pre-installed on the metal resin tank. This is a common material for resin printing that requires periodic replacement as it degrades over time. Product B uses ACF release liner film, a composite technology designed specifically for faster printing cycles. ACF films often offer different release characteristics compared to traditional FEP, aiming to improve print efficiency and reduce sticking issues during the peeling process.
Film thickness
Product B specifies a film thickness of 0.3mm. This thickness helps prevent the release film from breaking during the printing process, ensuring durability against everyday use. Product A does not list a specific film thickness in its published specifications. The 0.3mm measurement in Product B provides a concrete metric for durability and resistance to wear, which is a key factor for long-term reliability in resin printing environments.
UV transmittance
Product B boasts 92% UV light transmittance, ensuring faster and more accurate curing of resin. This high transmittance rate is critical for maintaining print quality and speed. Product A does not provide a specific UV transmittance percentage for its pre-installed FEP film. While standard FEP films generally allow UV light through, the explicit 92% figure in Product B offers a measurable advantage for users prioritizing curing efficiency and accuracy.
Build structure
Product A is a complete metal resin tank made of anodized aluminum, providing a durable housing for the resin and FEP film. It includes features like neat screws and feet to keep the film off the workbench. Product B is solely a release liner film pack and does not include a tank structure. If you need a full vat assembly, Product A provides the necessary hardware, whereas Product B is just the consumable film layer.
Print speed compatibility
Product B is explicitly designed to support three times faster printing with RAPID resin on the Saturn 3 Ultra. This indicates a specific optimization for high-speed printing workflows. Product A is a general-purpose tank compatible with all types of resin but does not claim specific speed enhancements or optimizations for rapid printing cycles. If your workflow relies on fast printing with specialized resins, Product B offers a targeted performance benefit.
Choose the Right Resin Tank or Film
Saturn 2 or 3 owners needing a complete tank
This option is a full metal resin tank designed specifically for Saturn 2 and Saturn 3 printers. It measures 292.8 by 172.4 by 33 mm and includes a pre-installed FEP film. The anodized aluminum construction ensures durability for long-term use. You get a ready-to-install unit that protects your LCD screen while providing a stable base for resin printing.
Saturn 3 Ultra users seeking faster print speeds
This ACF film pack supports three times faster printing when used with RAPID resin. The composite technology prevents adhesion to the LCD screen, ensuring clean releases. With 92% UV light transmittance, it allows for accurate curing. The 0.3 mm thickness offers durability, and the non-stick surface reduces wrinkles or bubbles during the printing process.
Printers wanting a spare tank for quick color changes
Having a spare metal tank allows you to switch resin colors rapidly without cleaning the primary vat. This tank features neat screws to fix it in place and feet on the bottom to keep the FEP film from touching your workbench. It works with all types of resin and comes with an extra lid to keep out dust and UV light.
Quick picks
| # | Product | Best for | Price |
|---|---|---|---|
| 1 | ELEGOO Saturn 2 and 3 Metal Resin Tank with FEP | Saturn 2/3 users wanting durable FEP tanks | Check price of ELEGOO Saturn 2 and 3 Metal Resin Tank with FEP on Amazon |
| 2 | ELEGOO Saturn 3 Ultra ACF Film 3-Pack | Saturn 3 Ultra users wanting faster prints | Check price of ELEGOO Saturn 3 Ultra ACF Film 3-Pack on Amazon |
The products compared
ELEGOO Saturn 2 and 3 Metal Resin Tank with FEP
Best for: Saturn 2/3 users wanting durable FEP tanks
- Release Film Type
- FEP (what this guide is about)
- Primary Material
- Anodized aluminum
- Dimensions
- 292.8*172.4*33mm
- Printing Technology
- LCD
- Color
- Black
- Weight
- 2.2 pounds
View on Amazon: ELEGOO Saturn 2 and 3 Metal Resin Tank with FEP Affiliate link
This ELEGOO resin tank is built from anodized aluminum and comes with an FEP release film pre-installed. Its dimensions are 292.8 x 172.4 x 33 mm, making it a direct fit for Saturn 2 and Saturn 3 printers. The metal construction offers durability for long-term use. You get a spare vat to switch resin colors quickly. The design includes feet to keep the film off your workbench.
Pros
- Constructed from durable anodized aluminum
- FEP release film is pre-installed
- Includes extra lid to block dust and UV light
- Features feet to protect the FEP film from the workbench
Cons
- Limited to FEP release film type
- Heavier at 2.2 pounds compared to plastic alternatives
- Only compatible with Saturn 2 and Saturn 3 models
Good fit if
- You want a durable metal tank for Saturn 2 or Saturn 3
- You prefer FEP film for easier peeling
- You need a spare vat to change resin colors faster
Skip if
- You own a Saturn 3 Ultra or Saturn 4 printer
- You require ACF film for specific resin types
- You need a lightweight tank for easy handling
Verdict: ELEGOO Saturn 2/3 Anodized Aluminum FEP Resin Tank provides a sturdy metal option for Saturn 2 and Saturn 3 users who prefer FEP film. It is ideal for those who want a durable, ready-to-use spare vat.
ELEGOO Saturn 3 Ultra ACF Film 3-Pack
Best for: Saturn 3 Ultra users wanting faster prints
- Release Film Type
- ACF (what this guide is about)
- Dimensions
- 290mm*195mm
- Film Thickness
- 0.3mm
- Printing Technology
- Resin
View on Amazon: ELEGOO Saturn 3 Ultra ACF Film 3-Pack Affiliate link
This ELEGOO accessory is a set of three ACF release films designed specifically for the Saturn 3 Ultra resin printer. Measuring 290mm by 195mm with a 0.3mm thickness, the composite film offers 92% UV transmittance for accurate curing. The non-stick surface reduces release tension, helping prints detach easily without wrinkles or bubbles. It is built to withstand chemical exposure and UV light while supporting faster printing speeds with compatible resins.
Pros
- 0.3mm thick composite film prevents tearing
- 92% UV light transmittance for faster curing
- Non-stick surface reduces release tension
- UV stable and chemical resistant
Cons
- Only compatible with Saturn 3 Ultra model
- ACF film type may not suit all resin workflows
- No included tool for film installation
Good fit if
- You own a Saturn 3 Ultra printer
- You want to reduce print adhesion issues
- You need durable replacement films for frequent use
Skip if
- You use a Saturn 2 or older Saturn model
- You prefer FEP film for its lower cost
- You need films for a different printer brand
Verdict: ELEGOO ACF Release Liner Film for Saturn 3 Ultra is a specialized upgrade for Saturn 3 Ultra owners seeking faster prints and easier model release. It fits users who prioritize print quality and durability over the lower cost of standard FEP films.
Specifications side by side
| Spec | ELEGOO Saturn 2 and 3 Metal Resin Tank with FEP | ELEGOO Saturn 3 Ultra ACF Film 3-Pack |
|---|---|---|
| Primary Material | Anodized aluminum | not stated |
| Dimensions | 292.8*172.4*33mm | 290mm*195mm |
| Release Film Type | FEP | ACF |
| Film Thickness | not stated | 0.3mm |
| Printing Technology | LCD | Resin |
| Color | Black | Saturn 3 Ultra ACF |
| Weight | 2.2 pounds | not stated |
| Size | S-for Saturn 2/3 | 3PCS-Saturn 3 Ultra ACF |
| Model | not stated | US-SO-3D-305 |
Frequently asked questions
Can I use the FEP tank on my Saturn 3 Ultra?
No, the ELEGOO Saturn 2 and 3 Metal Resin Tank with FEP is designed specifically for Saturn 2 and Saturn 3 models. It does not fit the Saturn 3 Ultra. You should choose the dedicated ACF film for the Ultra model to ensure proper compatibility and print quality.
Is ACF film better than FEP for print speed?
Yes, ACF film is designed for faster prints and easier model release compared to standard FEP. The ELEGOO Saturn 3 Ultra ACF Film 3-Pack is a specialized upgrade for users who prioritize print speed and durability. It is an ideal choice if you want to reduce print times on compatible hardware.
Does the metal tank come with the FEP film installed?
Yes, the ELEGOO Saturn 2 and 3 Metal Resin Tank with FEP includes a pre-installed FEP film. It is a ready-to-use spare vat that provides a sturdy metal option for resin printing. This setup saves you the hassle of manually stretching film over the tank bottom.
How many ACF films are included in the pack?
The ELEGOO Saturn 3 Ultra ACF Film 3-Pack contains three individual films. This quantity allows you to have spares ready for replacement when the current film degrades. It is a convenient bundle for maintaining consistent print quality over time without needing to buy single sheets.
What is the main difference between FEP and ACF?
FEP is a standard release film material that requires periodic replacement as it degrades. ACF is a specialized film type designed for faster prints and easier model release. The choice depends on your printer model and whether you prioritize standard durability or enhanced speed and release performance.
Is the Saturn 3 Ultra ACF film compatible with Saturn 2?
No, the ELEGOO Saturn 3 Ultra ACF Film 3-Pack is specifically designed for the Saturn 3 Ultra printer. It will not fit the Saturn 2 or Saturn 3 models. You must select the correct film or tank version that matches your specific printer hardware to ensure proper function.