Orange Peel and Cratering in Your Paint Film? The Problem May Be Leveling- Suzhou Qingtian New Material Co., Ltd.

Orange Peel and Cratering in Your Paint Film? The Problem May Be Leveling

2026/06/04

Leveling Agent | Surface Defects

Surface defects like orange peel texture and cratering are among the most visible coating failures — and they are often misattributed to application error when the real root cause is the formulation's surface tension profile.

For automotive OEM, industrial metal, furniture, and consumer electronics coating applications, film surface quality directly determines product value and customer acceptance. When orange peel or cratering appears, the cost is not just rework — it is quality reputation. Solving these defects starts with understanding their chemistry-level root cause.

Common Leveling-Related Surface Defects

Surface Texture

Orange Peel Texture

Fine, uniform waviness resembling orange skin. Caused by the wet film failing to flow out and self-level before viscosity increase locks the surface in place during solvent evaporation.

Cratering

Cratering / Fisheye

Small circular depressions in the cured film. Caused by surface tension differentials — typically from contamination, silicone migration, or substrate energy incompatibility — pulling the wet film away from localized points.

Spray Texture

Spray Texture Retention

Spray-applied coatings that fail to flow out between droplet impact and gelation retain surface topography from the spray process — producing a textured rather than smooth finish.

With DH-3187

Target: Smooth, Defect-Free Film

Uniform surface tension profile across the wet film suppresses defect-driving convection currents and allows the coating to flow to uniform thickness before cure — delivering the clean, high-gloss finish end customers expect.

Why Adjusting Spray Parameters Is Not Enough

Many coating engineers respond to leveling defects by adjusting spray pressure, gun distance, or application speed. These parameters do matter — but they cannot compensate for a coating with an inherently poor surface tension profile.

The root physics: Leveling defects arise from surface tension differentials (Marangoni flow) that create convection currents in the wet film, and from the rapid viscosity increase during solvent evaporation that locks in surface texture before leveling can occur. Modifying application parameters shifts timing but does not change the underlying formulation chemistry.

How Leveling Agents Address the Root Cause

Surface Migration

DH-3187 migrates to the wet film surface during application and the early stages of solvent evaporation

Surface Tension Equalization

Creates a more uniform surface tension profile across the wet film — suppressing Marangoni convection currents

Enhanced Film Flow

Improves overall film mobility during the leveling window, allowing the coating to flow to uniform thickness

Defect-Free Cure

Film reaches uniform surface topography before viscosity sets — delivering consistently smooth, high-gloss results

The Solution

DH-3187 Polyacrylate Leveling Agent

Polyacrylate-Based | Silicone-Free | Solvent-Based Systems

DH-3187 is a polyacrylate-based surface flow and leveling additive engineered to overcome the chemistry-level root causes of orange peel and cratering. Unlike silicone-based leveling agents, DH-3187 does not impair intercoat adhesion or recoatability — making it the preferred choice for multi-coat industrial systems where topcoat performance is critical.

Orange Peel Reduction

Effective reduction of orange peel texture in both spray and roller applications across a range of film thicknesses

Cratering Suppression

Reduces fisheye and crater formation by minimizing surface tension differentials in the wet film

Silicone-Free Formula

Does not impair intercoat adhesion or recoatability — critical for multi-coat industrial and automotive systems

No Haze in Clear Coats

Compatible with clear coat formulations — does not cause haze or cloud formation in transparent systems

Color Flooding Reduction

Beneficial secondary effect on Bénard cell formation and color flooding in pigmented systems

Vertical Surface Control

Effective for vertical surface applications where flow-sag balance is critical

Product	Chemical Basis	Compatible Systems	Application Method
DH-3187	Polyacrylate copolymer	Solvent-based industrial, automotive topcoats, wood coatings, architectural coatings	Spray, roller application

Key Takeaway

Orange peel and cratering are formulation-level problems that require a chemistry-level solution. Adjusting spray parameters alone cannot overcome an inadequate surface tension profile in the wet film. DH-3187 polyacrylate leveling agent addresses the root cause — improving surface flow, reducing defect-driving convection currents, and delivering consistently smooth, high-gloss film surfaces without compromising intercoat adhesion.