Sunlu PLA+ Silk Filament Rainbow 03 — PLA+ silk 3D printing filament, color gradient spool

Sunlu PLA+ Silk Filament Rainbow 03 is a silk-type PLA+ filament for FDM/FFF 3D printers that creates glossy, iridescent surfaces with gradual color shifts along the spool. The gradient changes approximately every 8 meters, producing unique rainbow-like effects that enhance decorative models, prototypes and display pieces without additional finishing.

Advantages

The filament combines the ease of printing typical for PLA-based materials with an enhanced surface sheen that gives prints a smooth, reflective finish. It is produced 100% bubble-free and supplied on a carefully wound spool that reduces the risk of tangles and supports stable, uninterrupted printing. Recommended print parameters and a practical spool design help maintain consistent quality across prints.

Suitable for

• Decorative models and display pieces
• Prototypes and concept models where surface appearance matters
• Cosmetic parts and art objects with iridescent finish
• Hobbyist projects and educational prints

When it may not be suitable

This filament is optimized for visual appearance rather than high-temperature or mechanically demanding applications. It may not be the best choice for functional parts that require high heat resistance, structural strength, or significant mechanical load. For technical or load-bearing components, consider engineering-grade materials.

Key specifications

• Material: PLA+ (silk-type)
• Color: Rainbow gradient (approx. color shift every 8 m)
• Diameter: 1.75 ± 0.02 mm
• Spool weight: 1 kg
• Estimated filament length: ~330 m (1 kg, 1.75 mm)
• Bubble content: 100% bubble-free

How to use

Use standard PLA print settings and verify nozzle temperature compatibility with your printer. For best surface quality, start with a nozzle temperature around 200–210°C and a heated bed at 50–60°C. Print speeds of 40–60 mm/s are recommended to reproduce fine details accurately; higher speeds are possible within the filament’s broader temperature/speed ranges but may affect surface finish. Dry the filament at 50°C before printing if it has absorbed moisture, and thread the filament through the spool holes to allow even drying and free unwinding during printing.

What to consider before purchase

• Intended use: optimized for visual and decorative prints, not for high-temperature or load-bearing parts
• Printer compatibility: compatible with most FDM/FFF printers using 1.75 mm filament
• Recommended printing parameters: nozzle ~200–215°C, bed 50–60°C; adjust for your setup
• Storage and drying: store dry and dry at 50°C if necessary to avoid moisture-related issues

Usage recommendations

To achieve consistent rainbow transitions and a glossy finish, print at moderate speeds (40–60 mm/s), maintain the recommended temperature range, and ensure the filament is dry before use. Use adhesive on the build plate only before heating; once the bed reaches 50–60°C adhesion is typically sufficient without additional adhesives.