Curly birch is a highly sought-after material for knife handles due to its stunning and unique grain pattern. At Roselli, we use only premium curly birch to ensure that our knife handles meet the highest standards of quality and aesthetics. This results in handles that feature an intense, eye-catching marbling, along with natural characteristics such as small cracks, pores, and holes. In this post, we explain why these features occur, how they affect the functionality of the knife, and how to best care for your handle.
カーリーバーチ ― ナイフハンドルに使われる特別な木材
Why do small cracks appear in curly birch?
The small cracks that sometimes appear in premium curly birch are a natural result of the wood’s structure. The more intense and irregular the marbling, the more varied the fiber direction becomes, which can occasionally lead to minor surface cracks. These cracks are typically superficial and do not affect the wood’s strength or longevity.
How do pores and holes form in curly birch?
Curly birch (Betula pendula var. carelica) is a mutation of silver birch, growing irregularly with numerous folds, knots, and a dense, twisted grain. This unique growth pattern gives rise to small pores and holes in the wood. Here are the main factors that contribute to this phenomenon:
Growth abnormalities: Curly birch grows slowly and unevenly, which can sometimes lead to incomplete cell formation or irregular cellular arrangements, resulting in tiny pores. Air pockets and empty cell spaces: As the tree develops, inconsistencies in the cellular structure may create small air pockets or empty spaces between the cells. These appear as small cracks in the wood.
Variations in wood density: Due to its dense and twisted structure, curly birch develops differently from regular birch. Variations in density can lead to the formation of small pores or cracks. Despite these natural features, curly birch is highly valued for its decorative patterns and these pores and holes rarely affect the material’s usability in knife handles, furniture making, or instrument crafting.
Do these features affect the durability of the knife handle?
No, the small cracks, pores, and holes do not affect the handle's functionality. Our rigorous manufacturing processes ensure that every knife handle meets our strict quality standards.
How to care for a curly birch knife handle?
To maintain the beauty and longevity of your curly birch knife handle, we recommend the following steps:
Regular oiling:
Apply a small amount of linseed oil or beeswax to preserve the wood’s moisture balance.
Avoid extreme conditions:
Wood naturally reacts to temperature and humidity changes. To keep your knife in top shape, don’t leave it in water too long or expose it to extreme temperatures.
Summary
Curly birch is an exceptional choice for knife handles, prized for its beauty and unique grain pattern. Small cracks in highly marbled pieces are a natural feature of the wood and do not affect its durability. With proper care, your handle will stay strong and stunning for generations.
Do you have more questions about our materials and manufacturing processes? Feel free to contact us!