Silk PLA is a unique filament prized for its glossy, metallic-like finish, making it perfect for aesthetic prints such as figurines, vases, and other decorative items. However, achieving that perfect finish isn’t just about the material itself — it’s also crucial to ensure proper bottom attachment of the print to the build surface. The first layer is the foundation of any 3D print, and in silk PLA printing, mastering the bottom attachment can make all the difference between a successful print and a failed one. This article will explore how to optimize the bottom attachment when working with silk PLA filament.
Why Bottom Attachment is Critical for Silk PLA
The bottom attachment, also known as first-layer adhesion, is the bond between the first layer of filament and the build surface of your 3D printer. For silk PLA, proper bottom attachment ensures that the model sticks to the bed throughout the entire printing process, preventing issues like warping, lifting, or poor-quality finishes.
A strong bottom attachment not only secures the print in place but also contributes to the smoothness and visual appeal of the final product. Since silk PLA is often used for its aesthetic properties, ensuring a flawless bottom layer will enhance the overall appearance, adding to the material’s characteristic sheen and smoothness.
Bed Preparation for Optimal Bottom Attachment
Achieving proper bottom attachment starts with the preparation of your print bed. Different bed surfaces may require varying levels of preparation to achieve the best results with silk PLA.
Glass bed: A glass print bed can produce an ultra-smooth, glossy finish on the bottom layer, which complements the look of silk PLA. Applying a thin layer of adhesive, such as a glue stick or hairspray, can improve adhesion and prevent the print from lifting during the process.
PEI sheet or tape: For users who prefer using PEI or other adhesive surfaces like painter’s tape, these materials can provide good adhesion while still allowing for easy removal after the print is complete.
Bed leveling: A properly leveled bed is essential for ensuring consistent bottom attachment across the entire print surface. Manual or automatic leveling should be checked before each print to ensure the nozzle is positioned at the correct distance from the bed.
First Layer Settings for Silk PLA
Once your bed is prepared, the next step is adjusting your print settings to ensure strong bottom attachment for silk PLA.
Layer height: Start with a slightly thicker first layer, around 0.2mm to 0.3mm. This allows for better adhesion to the bed and provides a solid foundation for the rest of the print.
Print speed: For the first layer, slow down the print speed to around 20-30mm/s. Slower printing helps ensure that the filament has enough time to adhere properly to the bed.
Extrusion temperature: Silk PLA typically prints best at temperatures between 200°C and 230°C. Ensuring the right extrusion temperature helps the filament flow smoothly and adhere well to the bed, forming a clean, even bottom layer.
Additional Adhesion Aids
In addition to bed preparation and print settings, there are several adhesion aids you can use to further improve the bottom attachment of silk PLA.
Brims or skirts: Adding a brim or skirt to your print can help anchor the first layer to the bed. This is especially useful for models with small surface areas in contact with the bed.
Glue stick or adhesive spray: Applying a thin layer of glue stick or adhesive spray to the bed can create extra grip, ensuring the silk PLA sticks well during printing.
Post-Print Removal and Finishing
After your print is complete, it’s important to allow the bed to cool down before attempting to remove the model. Silk PLA can adhere quite strongly to the bed, especially if the bottom attachment was optimal. Letting the bed cool will naturally reduce the bond, making it easier to remove the print without damaging the delicate surface.
Conclusion
Mastering the bottom attachment of silk PLA is essential for achieving high-quality, visually appealing prints. By preparing your bed correctly, adjusting your first layer settings, and using adhesion aids, you can ensure a smooth, strong foundation for your prints. With the right setup, silk PLA will deliver the glossy, impressive results it’s known for, starting with a perfect first layer.