The "barber pole effect" in book matching veneers is primarily connected to which issue?

In the context of book matching veneers, the "barber pole effect" is primarily associated with the mixing of tight and loose faces. This phenomenon occurs when the grain patterns and textures of the veneers result in alternating sections that create a visual contrast, akin to the stripes of a barber pole. When tight (smooth) and loose (open grain) faces are combined, the difference in texture and appearance can create this distinct pattern, leading to an unintentional aesthetic effect that may not be desired in the finished product.

Tight and loose faces have different absorption characteristics, which can also influence how they receive finishes or stains, potentially enhancing this striping effect. Understanding this is essential for craftsmen working with veneers, as they need to be aware of how these elements interact and affect the overall look of the final installation.

In contrast, mismatching veneers refers to using pieces with different wood types or colors, while the effect of lighting sources speaks to more external influences that can impact how the grain is perceived. Misapplication of penetrating stain deals with the finishing process rather than the fundamental textural differences that lead to the barber pole pattern.