When using white ink as a base layer for color printing, a white outline may sometimes appear around the edges of the finished pattern. This issue is commonly referred to as “white exposure.” It occurs when the color ink does not fully cover the underlying white ink layer.

Solution

Function Introduction

The White Underbase Choke function is designed to effectively reduce white exposure. This function works by slightly shrinking the white ink layer inward from the edges of the image. As a result, the white ink printing area becomes slightly smaller than the color layer above it, allowing the color ink to fully cover the white ink during printing and produce clean, edge-free results.

Setup Method

Setting location

 In the Print Settings panel on the right side of the editor, locate the White Underbase Choke option.

Default value

The default setting is 0.2 mm. This value is suitable for most common materials such as phone cases, acrylic, and leather. In most cases, good results can be achieved without changing this value.

Adjustment Suggestions

Under normal conditions, it is recommended to keep the default setting. Only adjust this value if print results show visible issues.

Increase the White Underbase Choke value

 This is recommended when white edges are visible around the pattern.

• Reason: The white ink layer is not contracted enough and extends beyond the coverage area of the color ink.

• Action: Gradually increase the White Underbase Choke value in small increments (for example, 0.1 mm) until the white edge disappears.

• Note: The recommended maximum value is 0.5 mm.

Reduce the White Underbase Choke value.

 This applies when the pattern's edges appear darker or slightly distorted.

• Reason: Excessive contraction of the white ink layer reduces white support at the edges, affecting color appearance.

• Action: This situation is uncommon. If it occurs, slightly reduce the White Underbase Choke value.

Precautions

Improper settings may affect print quality. Please note the following:

• Value too small: Insufficient contraction may cause white ink to extend beyond the color layer, resulting in visible white edges.

• Value too large: Excessive contraction may cause edge colors to darken due to reduced white background support, affecting overall visual quality.