IIID Max - High Speed PLA+ Rainbow Silk Filament 1.75mm 1kg

IIID Max Rainbow Silk PLA+ — Full Spectrum Metallic in One Spool

The IIID Max Rainbow Silk PLA+ Filament 1.75mm packs the entire color spectrum into a single spool with a glossy silk finish. As it prints, the filament transitions through red, orange, yellow, green, blue, and violet in smooth metallic gradients — creating prints that look like they were finished by a professional painter. High speed compatible up to 300mm/s, vacuum-sealed with desiccant, 1kg spool.

Rainbow silk is the ultimate "wow factor" filament. It requires zero skill beyond loading the spool — the material does all the work, producing dramatic, multi-colored metallic prints that are impossible to achieve with single-color filaments without multiple spool changes or post-processing. It is one of the most popular filaments for social media, maker markets, and gifts.

What Makes Rainbow Silk Different from Tri-Color?

Our Tri-Color Silk blends three specific colors (Blue, Yellow, Fuchsia) in metallic tones. Rainbow Silk goes further — it cycles through the full visible spectrum with gradual transitions between each hue. The result is more varied and unpredictable, with every section of the print showing different color combinations. Tri-Color gives you a controlled, harmonious palette; Rainbow gives you the entire rainbow in metallic silk finish.

Key Specifications

Tips for Maximum Rainbow Effect

The color transition length is fixed by the manufacturing process, so the way it shows on your print depends on how much filament each layer uses. Tall, narrow models will show many color changes from base to top. Wide, flat models may show color shifts across the same layer. For the most dramatic rainbow effect, print models that are at least 10-15cm tall. Use 0.20mm layer height for a balanced look between detail and color variation.

Print at 215-225°C with fan at 50-70% for the best metallic sheen. Avoid excessive retraction to minimize stringing between color zones.

Prefer a controlled metallic palette? Try Silk PLA in Bronze, Gold, or Copper. For a three-color blend, check our Tri-Color Silk. Save with Silk PLA bundles. Compare all filaments in our 3D Printing Filaments guide.