Uneven Texture Replication (Inconsistent Etched Grain)

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Uneven Texture Replication (Inconsistent Etched Grain)

Last updated on Jul 22, 2026

(1) What is Uneven Texture Replication? (Visual Defect)

Uneven texture replication means the embossed/etched pattern on the mold cannot be sharply reproduced onto the molded part.

Figure 1: Uneven texture replication on texture evaluation specimen (Specimen length: approx. 10 cm)

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(2) Causes of Uneven Texture Replication

(2-1) Insufficient Packing Pressure

Uneven texture replication occurs when the packing pressure required to press resin against the mold cavity surface is inadequate. Conditions leading to insufficient packing pressure are listed below:

Low barrel temperature (including nozzle)

Low mold temperature

Undersized gate

Undersized runner

Low set packing pressure

Low injection speed

Low material melt flow

Core Logic

Insufficient Packing Pressure → Incomplete Surface Replication → Uneven Texture

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Uneven Texture Replication (Inconsistent Etched Grain)