SUNLU 1.75mm Black PLA Filament vs SUNLU Rainbow PLA Filament (2026): Key Differences
As an Amazon Associate we earn from qualifying purchases. Links on this page are affiliate links.
When comparing sunlu pla 3d printer vs pla rainbow filament, you are looking at two distinct PLA options from the same brand. Both filaments share a 1.75mm diameter and ±0.02mm dimensional accuracy, ensuring compatibility with most FDM printers. The primary difference lies in their visual output and weight. One offers a solid black finish for standard projects, while the other provides a multicolor rainbow effect. Understanding these spec variations helps you select the right material for your specific printing needs.
Key differences
| Aspect | SUNLU 1.75mm Black PLA Filament 1kg | SUNLU Rainbow PLA Filament |
|---|---|---|
| Net Weight | 1KG | 2KG |
| Color | Black | Rainbow More Like Pink |
| Max Print Speed | 100mm/s | 60 mm/s |
| Surface Finish | not listed | Pearly |
Which one should you choose?
Choose SUNLU 1.75mm Black PLA Filament 1kg if
- You need a solid black color for functional or standard prints.
- You prefer faster printing speeds up to 100mm/s.
- You want a lighter 1KG spool for smaller projects.
Choose SUNLU Rainbow PLA Filament if
- You want a multicolor rainbow effect for decorative items.
- You prefer a pearly surface finish on your prints.
- You need a larger 2KG spool for extended printing sessions.
Verdict: Choose the black PLA if you prioritize print speed and standard solid colors. Select the rainbow PLA if you want vibrant, multicolor results with a pearly finish for decorative pieces. Both options maintain high dimensional accuracy for reliable performance.
SUNLU Black vs Rainbow PLA Specs
Print speed
The SUNLU 1.75mm Black PLA Filament 1kg supports a maximum print speed of 100mm/s. This allows you to produce standard parts quickly without sacrificing quality. In contrast, the SUNLU Rainbow PLA Filament recommends a slower speed of 40-60mm/s. The manufacturer suggests this lower speed to ensure the multicolor transitions print cleanly. If you need to print large volumes of solid objects, the black filament offers a significant advantage in throughput. The rainbow version is better suited for detailed decorative items where speed is secondary to visual consistency.
Net weight
You get more material with the SUNLU Rainbow PLA Filament, which comes in a 2KG net weight package. The SUNLU 1.75mm Black PLA Filament 1kg contains only 1KG of filament. This means the rainbow option provides double the printing volume for your purchase. For large projects or extended printing sessions, the heavier spool reduces the frequency of spool changes. The black filament is lighter, which might be preferable if you are storing multiple spools or using a printer with limited weight capacity on the extruder arm.
Color effect
The SUNLU 1.75mm Black PLA Filament 1kg provides a solid, uniform black finish. This is ideal for functional prototypes, mechanical parts, or professional-looking models where a consistent color is required. The SUNLU Rainbow PLA Filament features a multicolor effect, specifically noted as Rainbow More Like Pink. The color changes every 8 meters in the new version, offering frequent variations. This makes it perfect for artistic creations, holiday decorations, or gifts. Choose the black filament for utility and the rainbow filament for visual impact.
Surface finish
The SUNLU Rainbow PLA Filament is described as having a pearly surface finish. This gives printed objects a unique, smooth, and slightly lustrous appearance. The specifications for the SUNLU 1.75mm Black PLA Filament 1kg do not list a specific surface finish, implying a standard matte or semi-gloss PLA look. The pearly effect on the rainbow filament adds a premium tactile quality to your prints. If you prefer a classic, understated look, the black filament is the safer choice. For eye-catching results, the pearly rainbow option stands out.
Temperature settings
Both filaments require similar nozzle temperatures, but the black filament allows for a slightly higher range. The SUNLU 1.75mm Black PLA Filament 1kg recommends a nozzle temperature of 200-230°C. The SUNLU Rainbow PLA Filament suggests 200-210°C. The heated bed settings are comparable, with the black filament accepting up to 65°C and the rainbow filament up to 60°C. The wider temperature window for the black filament offers more flexibility for different printer extruders. The rainbow filament has stricter thermal limits to preserve its color integrity.
Choose based on speed and color
Users needing fast production runs
The SUNLU 1.75mm Black PLA Filament 1kg supports a maximum print speed of 100mm/s. This higher speed allows you to produce standard parts more quickly than with the rainbow variant. The neat winding reduces tangles, ensuring smooth feeding during these faster prints. It is the practical choice for efficiency.
Creators wanting multicolor decorations
The SUNLU Rainbow PLA Filament changes color every 8 meters, offering more frequent variations in small items. Its pearly surface finish provides a unique look for gifts or holiday decorations. While slower at 60mm/s, the consistent diameter and vacuum sealing ensure reliable, bubble-free prints with distinct color shifts throughout the object.
Printers prioritizing moisture protection
The SUNLU Rainbow PLA Filament comes vacuum sealed with a desiccant pack to keep the filament dry during transport. This rigorous pre-packaging drying helps eliminate clogs and bubbles caused by moisture. The black filament also ensures quality, but the rainbow option explicitly highlights this vacuum-sealed protection for consistent print results.
The products compared
SUNLU 1.75mm Black PLA Filament 1kg
Best for: consistent black prints and smooth feeding
- Material Type
- PLA
- Filament Diameter
- 1.75mm
- Net Weight
- 1kg
- Max Print Speed
- 100mm/s
- Dimensional Accuracy
- ±0.02mm
- Printing Technology
- FDM
View on Amazon: SUNLU 1.75mm Black PLA Filament 1kg Affiliate link
This SUNLU Black PLA filament is a 1.75mm spool designed for reliable FDM printing. It features a dimensional accuracy of +/- 0.02mm, which helps prevent clogs and tangles. The neat winding reduces jams for a smoother experience. It is suitable for almost all 1.75mm printers and supports print speeds up to 100mm/s. This solid black option is ideal for functional parts or prototypes where color consistency matters.
Pros
- Dimensional accuracy of +/- 0.02mm for wide compatibility
- Neat winding device reduces risk of tangles and jams
- Supports print speeds up to 100mm/s
- No clogs, bubbles, or tangles during printing
Cons
- Only available in a single solid black color
- Standard 1.75mm diameter may not fit specialized printers
- Requires specific temperature settings between 200-230°C
Good fit if
- You need a reliable black filament for functional prints
- You want a spool that is easy to load and feed
- You use standard 1.75mm FDM 3D printers
Skip if
- You require multi-color or gradient printing effects
- You prefer filaments with specialized material properties
- You need a spool size larger than 1KG
Verdict: SUNLU Black PLA 1.75mm Filament 1KG is a practical choice for users who need consistent black prints with minimal jamming issues. It fits those who prioritize dimensional accuracy and smooth feeding in their daily printing workflow.
SUNLU Rainbow PLA Filament
Best for: colorful decorative prints and bulk needs
- Material Type
- PLA
- Filament Diameter
- 1.75mm
- Net Weight
- 1kg
- Max Print Speed
- 60MM/s
- Dimensional Accuracy
- ±0.02mm
- Surface Finish
- Pearly
View on Amazon: SUNLU Rainbow PLA Filament Affiliate link
This SUNLU PLA Rainbow filament features a 1.75mm diameter with ±0.02mm dimensional accuracy for consistent printing. The 2KG spool offers a pearly surface finish and changes color every 8 meters. It is vacuum sealed to prevent moisture absorption. You should use this material for decorative items like holiday ornaments. The recommended print speed is 40-60 mm/s. It works with most FDM 3D printers.
Pros
- 2KG net weight provides more material than the 1KG black version
- Color changes every 8 meters for faster variation
- Vacuum sealed with desiccant for moisture protection
- Pearly surface finish adds visual appeal
Cons
- First color is random
- Limited to 60 mm/s max print speed
- Specific rainbow colorway may not match all projects
Good fit if
- You want more filament per purchase
- You need color-changing effects for decorations
- You prefer pearly finishes
Skip if
- You require uniform single-color prints
- You need high-speed printing over 60 mm/s
- You want to control the starting color
Verdict: SUNLU 2KG Rainbow PLA Filament suits makers who need extra material for colorful, decorative projects. It delivers consistent diameter and moisture protection for reliable results.
Specifications side by side
| Spec | SUNLU 1.75mm Black PLA Filament 1kg | SUNLU Rainbow PLA Filament |
|---|---|---|
| Material Type | PLA | PLA |
| Filament Diameter | 1.75mm | 1.75mm |
| Net Weight | 1kg | 1kg |
| Max Print Speed | 100mm/s | 60MM/s |
| Dimensional Accuracy | ±0.02mm | ±0.02mm |
| Surface Finish | not stated | Pearly |
| Printing Technology | FDM | not stated |
| Color Printing | not stated | Multi-Color |
| Compatible Material | PLA | PLA |
| Color | Black | Rainbow More Like Pink |
| Size | 1KG | 2KG |
| Color Effect | not stated | Rainbow |
| Dimensions | 8.66 × 8.66 × 3.15 inches | not stated |
| Weight | 2.21 pounds | 2.2 pounds |
| Model | 3D Printer Filament PLA Filament 1.75mm | PLA Rainbow 03 |
Frequently asked questions
Which SUNLU PLA is better for functional parts?
The SUNLU 1.75mm Black PLA Filament is the better choice for functional parts. It is designed for consistent black prints and smooth feeding, which minimizes jamming issues. This consistency ensures reliable dimensional accuracy for everyday printing workflows. The rainbow variant focuses more on decorative aesthetics rather than pure utility.
How much filament do I get in each spool?
The black filament comes in a 1kg size, while the rainbow version offers a larger 2kg size. The black spool weighs 2.21 pounds total, and the rainbow spool weighs 2.2 pounds. You get twice the material with the rainbow option, making it suitable for bulk needs and larger projects.
Are both filaments compatible with standard 3D printers?
Yes, both filaments are compatible with most FDM printers. They share a standard 1.75mm diameter and ±0.02mm dimensional accuracy. This ensures they fit standard extruders without modification. You can use either filament in your daily printing routine without worrying about compatibility issues with your machine.
What is the main visual difference between the two?
The primary difference is the color output. The black filament provides a solid, consistent black finish for uniform parts. The rainbow filament produces colorful, decorative prints with a pinkish hue. Choose black for professional or mechanical parts, and rainbow for artistic or visual displays.
Is the rainbow filament good for large projects?
The SUNLU Rainbow PLA Filament is well-suited for large projects due to its 2kg size. It provides extra material for colorful, decorative needs. The larger quantity allows you to complete bulk orders or bigger models without frequently changing spools. It also features moisture protection for reliable results.
Does the black filament have any special winding features?
The SUNLU 1.75mm Black PLA Filament is noted for its neat winding. This design contributes to smooth feeding and reduces the risk of tangles or jams. It helps maintain consistent extrusion, which is critical for achieving high-quality prints. This makes it a practical choice for users prioritizing reliability.
Which filament offers better moisture protection?
The SUNLU Rainbow PLA Filament explicitly mentions moisture protection in its specifications. This feature helps maintain filament quality and print reliability. While the black filament is practical, the rainbow variant highlights its resistance to moisture, ensuring consistent diameter and performance for your decorative prints.