Post-Processing Tips for 3D Printed Minis
3D printing technology has undoubtedly revolutionized various industries, with remarkable freedom to build intricate designs, including miniatures. While the production process may seem straightforward, there’s a significant step worth due attention, notably post-processing. In essence, post-processing refers to the finishing steps required to enhance the 3D printed mini’s appearance and durability. In this guide, we will delve deep into effective post-processing techniques that can help elevate your 3D printed minis.
1. Removal From the Build Plate
For 3D printed minis, the removal process from the build plate requires meticulous finesse to preserve the integrity of the miniature. Utilize a spatula or palette knife to wedge between the item and the platform to prevent damage. This method is especially crucial for prints with elaborate details to avoid deformation occurring during removal.
2. Support Design and Removal
Crafting supports for 3D printed minis during the design phase ensures that overhanging elements are appropriately backed during printing. Post-print, gently eliminate the support structures using pliers or tweezers. Also, immerse the print in warm (not boiling) water to soften the supports, making them easier to remove without causing unwanted breakages.
3. Sanding
Sanding allows you to smooth rough surfaces while eliminating visible layer lines. Start sanding using a rough grit, around 100-200, and gradually progress to finer grits, up to 1000 for an ultra-smooth finish. For complex 3D printed minis, use a needle file set to reach tiny intricate areas.
4. Priming
Priming your 3D printed minis ensures a consistent base for subsequent painting or coloring. A well-applied primer helps highlight layer lines or defects, providing another chance for sanding before painting. Consider using auto-filling primers, as they help fill small gaps and crevices that regular primers might miss.
5. Painting
Before applying the primary paint, consider giving your mini a base coat. Base coating offers an under-layer for your chosen color while enhancing the paint’s vibrancy. After base painting, apply the main layer, following the contours of the 3D printed minis to maintain the details. For small-scale details, invest in a set of high-quality miniature brushes.
6. Weathering and Aging
Give your 3D printed mini a realistically aged look through weathering—a technique that simulates aging and wear. Methods include dry brushing, wherein a small, dry brush is dipped in paint, wiped off, and then brushed onto the mini’s raised areas. Washes – watered-down paint applied to the whole model – help promote color uniformity while allowing paint accumulation in deeper areas for shading.
7. Sealing
Sealing preserves the paint job while providing a specific finish—matte, satin, or gloss. Choose your sealant based on the desired look. Apply multiple thin layers rather than one thick one to avoid obscuring details.
8. Polishing
For minis meant to have a glossy and shiny finish, consider post-print polishing. First, the print undergoes a coarse polishing stage to remove layer lines and blemishes. Then, a fine polishing stage enhances the brilliance and smoothness.
9. UV Curing
For 3D printed minis made using SLA or DLP methods, UV curing is a necessary post-processing step. It involves bombarding the print with UV light, solidifying the resin, and enhancing the mini’s durability.
10. Vapor Smoothing
Vapor smoothing is a chemical process using acetone or similar solvents to smooth ABS prints by dissolving the outer layer slightly. This method offers an exceptional surface finish, ideal for 3D printed minis where aesthetics are paramount.
In conclusion, post-processing amplifies the look, feel, and endurance of 3D printed minis. Be it removal from the build plate, sanding, priming, painting, aging, sealing, or UV curing, every method offers unique enhancements. Realizing the perfect miniature may need a blend of these techniques, coupled with patience and precision.
