Subtitle: A comprehensive guide on dealing with and fixing cracks in wood bowl blanks
Have you ever come across those nasty cracks in your wood bowl blanks? Cracks are a common occurrence when turning wood bowls, especially when working with large chunks of wood that have not been commercially dried. Understanding the causes of cracks and learning how to effectively deal with them is essential for woodturners. In this article, we will explore the different types of cracks, the reasons behind them, and three effective methods for filling cracks and holes in your bowls to create aesthetically pleasing and structurally sound pieces.
Understanding Cracks in Wood Bowls
When working with wood bowl blanks, it’s crucial to understand the role of moisture content in causing cracks. Unlike commercially dried wood, which is not readily available in large sizes for bowl blanks, woodturners often use logs or wood they find or cut down themselves. These raw materials have higher moisture content, making them prone to cracks. Therefore, it becomes essential to properly manage and maintain the wood before and after turning it into bowls.
Types of Cracks and Defects
Cracks in wood bowls can vary in size and nature. Some are hairline cracks caused by surface tension, while others may result from defects such as knot holes or rot in the wood. Hairline cracks are usually not structural and can be easily fixed. Larger cracks, which may allow light to pass through, require more attention. Moreover, some cracks or defects on the surface may add an interesting aesthetic to the bowl, while others may be visually unappealing and require repair.
Methods for Filling Cracks and Holes
In this article, we will discuss three effective methods for filling cracks and holes in wood bowls. Each method offers its unique advantages and can be chosen based on the specific characteristics of the crack or defect.
The Super Thin CA Trick: Super thin CA glue is an excellent choice for filling fine cracks and achieving a solid bond. To utilize this method, start by pressing fine dust from the same piece of wood into the crack. Before applying the CA glue, spray a light coat of lacquer over the crack area to prevent the glue from staining the surrounding wood. Next, carefully apply the super thin CA glue and let it dry. Accelerator can be used to speed up the drying process, although it is debated whether this affects the longevity of the bond.
Wood Glue and Sandpaper Technique: If you prefer using regular wood glue, this method can offer a long-lasting bond. Apply a small amount of wood glue into the crack, ensuring it does not spread onto the surrounding wood. Immediately start sanding the surface with sandpaper, moving along the grain of the wood. The friction generated by sanding dries the glue, resulting in a smooth and blended surface with minimal evidence of the crack.
Filling Voids with Epoxy: When dealing with larger cracks or voids, epoxy can provide a durable and visually appealing solution. Start by removing any loose material from the void using a tool. Mask the backside of the void with gaffer’s tape to prevent epoxy from seeping out. Mix a two-part epoxy, such as a five-minute epoxy, in equal amounts and add a color filler to match the wood or create a contrasting effect. Fill the void with the epoxy mixture and let it cure. This method allows for customization and can create stunning visual effects when contrasting colors are used.
It’s crucial to note that the choice of method will depend on the size and nature of the crack, personal preference, and the desired outcome. Experimenting with different techniques and materials can help you find the most suitable approach for specific projects.
Conclusion
Dealing with cracks in wood bowl blanks is an essential skill for every woodturner. By understanding the causes of cracks and learning effective filling techniques, you can transform unsightly defects into beautifully repaired features that enhance the overall aesthetics and structural integrity of your wood bowls. Whether you choose the super thin CA trick, the wood glue and sandpaper technique, or filling voids with epoxy, each method offers unique advantages. By mastering these techniques, you can confidently tackle cracks and create stunning wood bowls that showcase your expertise as a woodturner. So don’t let cracks discourage you—embrace them as opportunities to showcase your skills and creativity!
