I found that improper storage of silk PLA resulted in poor moisture absorption, degradation and printing performance. To avoid these problems, it is important to protect Silk PLA from humidity and other environmental factors that can affect its quality.
Best practices for storage of polylactic acid filaments
The most efficient way to store PLA in airtight containers is in airtight containers. Storing the filament in a sealed environment helps prevent exposure to moisture. You can use filament storage boxes, vacuum airtight bags, or any durable airtight container. It is also a good idea to add a desiccant inside the container to absorb any residual moisture. Silicone packs work well and can be easily found online or in local stores.
Temperature control for storage in a cool, dry environment is key to proper filament storage. Silk PLA should be stored in a cool and dry place, away from direct sunlight and heat sources. Ideal storage conditions include a room temperature range of 15-25°C (59-77°F) and low humidity. Exposure to ultraviolet light and high temperatures degrades the filament, making it brittle and more likely to break during the printing process.
If you live in an area with high humidity, it can be helpful to monitor the humidity levels around your stored filament. A humidity sensor or hygrometer can be placed in a closed container to track humidity levels. The goal is to keep the humidity below 15% to prevent moisture from affecting the silk PLA.
If your PLA silk has absorbed moisture, using a filament dryer can help it return to its original state. Filament dryers heat the material at a controlled temperature, safely removing moisture and preparing the filament for successful printing. This is especially useful if the filament has been exposed to a humid environment for an extended period of time.