Sunlu PLA+ Silk Forth-Color filament — silk finish multicolor (blue–purple–red–gold)

Sunlu PLA+ Silk Forth-Color filament in the blue–purple–red–gold variant is a PLA+ 3D printing material with a silky, glossy finish and gradual color shifts. Using multi-color extrusion, a single filament produces prints that change appearance with viewing angle and light, making it suitable for decorative items, artistic models and prototypes that require both visual impact and reliable PLA+ performance.

Advantages

The filament provides a smooth, silky surface and pronounced color transitions without additional post-processing. It combines improved mechanical properties compared with standard PLA—greater strength, flexibility and impact resistance—while maintaining easy printability and stable feeding thanks to a controlled diameter and low shrinkage.

Suitable for

• Decorative figures, statuettes and display models
• Prototypes and concept models where appearance matters
• Gadgets and non-load-bearing functional parts
• Artistic and jewellery-like prints with glossy effects

When it may not be suitable

This filament is not intended for high-temperature or load-bearing engineering applications where heat resistance well above the listed temperatures is required. Although mechanically improved compared with standard PLA, it is not a substitute for engineering-grade polymers for demanding structural parts.

Also avoid using it where a perfectly uniform single colour is required; the multicolor effect is a deliberate characteristic and will produce gradual colour changes across the print.

Key specifications

• Material: PLA+ with silk additive
• Colour effect: blue → purple → red → gold (multicolor gradient)
• Density: 1.23 g/cm³
• Vicat softening temperature: 54 °C
• Heat deflection temperature: 57 ± 3 °C
• Melting temperature: 164 °C
• Melt flow rate: 7 ± 2.5 g/10 min
• Tensile strength: 50 ± 4 MPa
• Elongation at break: 11 ± 3 %
• Flexural strength: 78 ± 5 MPa
• Flexural modulus: 2600 ± 300 MPa
• Impact resistance (X–Y): 78 ± 5 kJ/m²

How to use

Print the Sunlu PLA+ Silk filament on FDM printers using standard PLA+ settings as a starting point. Recommended approach: set nozzle temperature near the filament's melting range, adjust printing temperature empirically for your printer and hotend (typically within common PLA+ temperatures), ensure a calibrated extrusion multiplier and a stable filament feed. Use a heated bed if required by your printer model and apply an adhesive or build-surface suited for PLA to improve first-layer adhesion. Allow parts to cool gradually after printing to preserve surface sheen and dimensional stability.

What to consider before purchase

• Intended use: decorative and prototype prints benefit most from the multicolor silk effect
• Temperature limits: not suitable for prolonged exposure above ~54–60 °C
• Printer compatibility: designed for FDM printers with standard PLA/PLA+ compatibility
• Colour variation: expect gradual colour transitions rather than uniform single-colour output

Usage recommendations

For best results, print at stable temperatures with a well-calibrated extrusion rate and minimal retraction; test a small sample to find optimal printer settings and preserve the filament’s silk sheen by avoiding excessive post-processing or high-temperature annealing.