Views: 0 Author: Site Editor Publish Time: 2026-10-30 Origin: Site
Aluminium paste is widely used in coatings to create metallic finishes, improve light reflectivity, and achieve different decorative effects. However, not all aluminium pigments behave in the same way. One of the most important distinctions is between leafing aluminium paste and non-leafing aluminium paste.
Both types can provide metallic effects, but their aluminium flakes behave differently inside a coating film. Understanding these differences helps coating manufacturers select the right aluminium paste for their formulations and application requirements.
Leafing aluminium paste contains aluminium flakes that tend to migrate and orient themselves near the surface of the coating film during application and drying.
This arrangement creates a relatively continuous metallic layer, producing a bright, silvery appearance with strong light reflectivity.
Key characteristics of leafing aluminium paste:
High metallic brightness and reflectivity
Strong silver appearance
Aluminium flakes mainly concentrated near the coating surface
Can provide a degree of surface barrier effect, depending on the coating system
Typical applications:
Leafing aluminium paste is commonly considered for applications where a bright metallic appearance and surface coverage are important, such as:
Industrial protective coatings
Roof coatings
Certain decorative metal coatings
Selected solvent-based coating systems
The final performance depends on the resin system, formulation, and application conditions.
Unlike leafing types, non-leafing aluminium paste is designed to remain more evenly distributed throughout the coating film rather than concentrating at the surface.
The aluminium flakes are embedded within the coating layer, allowing the coating to maintain a more integrated metallic appearance.
Key characteristics of non-leafing aluminium paste:
Aluminium flakes distributed throughout the coating film
Good potential for uniform metallic appearance
Better suitability for systems requiring overcoating or additional finishing layers
Available in different particle sizes and brightness levels
Typical applications:
Non-leafing aluminium paste is widely considered for applications where metallic appearance, coating compatibility, and subsequent finishing are important, including:
Automotive coatings
Industrial coatings
Plastic coatings
Printing inks
Decorative coatings
The appropriate grade should be selected according to the specific formulation and performance requirements.
The main difference between these two types is the orientation and distribution of aluminium flakes in the coating film.
Comparison | Leafing Aluminium Paste | Non-Leafing Aluminium Paste |
|---|---|---|
Flake orientation | Mainly near the coating surface | Distributed throughout the coating film |
Metallic appearance | Bright, reflective silver effect | More integrated metallic appearance |
Surface coverage | Generally higher surface concentration | More evenly distributed |
Overcoating | May require additional evaluation for adhesion | Often more suitable for overcoating |
Typical selection focus | Brightness and surface reflectivity | Appearance, compatibility and finishing |
Applications | Selected industrial and decorative coatings | Automotive, industrial, plastic coatings and inks |
Neither type is universally better. The right choice depends on the desired metallic effect and the requirements of the final coating system.
Before selecting an aluminium paste grade, coating manufacturers should consider the following factors.
1. Desired Metallic Appearance
If the main objective is a bright, highly reflective silver finish, leafing aluminium paste may be a suitable option.
If the coating requires a more integrated metallic appearance or a specific visual effect, non-leafing aluminium paste may be more appropriate.
2. Overcoating and Adhesion Requirements
For multi-layer coating systems, the position of aluminium flakes can influence the interaction between coating layers.
Non-leafing aluminium paste is often considered when additional coating layers or finishing processes are required. Actual intercoat adhesion should always be verified through testing.
3. Resin Compatibility
Different resin systems can affect pigment wetting, dispersion, orientation, and final appearance.
Manufacturers should evaluate the aluminium paste in their actual resin and solvent system rather than selecting a product based only on its general category.
4. Application Method
Spraying, brushing, printing, and other application methods can produce different flake orientations and metallic effects.
The selected aluminium paste should be tested under the intended application conditions to ensure consistent results.
Before adopting a new leafing or non-leafing aluminium paste, manufacturers should conduct practical formulation tests.
Recommended evaluation points include:
Appearance: Compare brightness, metallic effect, and surface uniformity.
Dispersion: Check whether the aluminium flakes are evenly incorporated into the coating.
Compatibility: Evaluate performance with the selected resin and other formulation components.
Application performance: Test under actual spraying, printing, or other production conditions.
Film performance: Evaluate adhesion, overcoating compatibility, and other properties required by the end application.
Testing both types under the same formulation and application conditions makes the comparison more meaningful.
Silver Rocket Metallic Pigment Co., Ltd. supplies metallic pigment products for a range of industrial applications, including aluminium paste, aluminium powder, and bronze powder.
Our aluminium paste products are designed for different metallic appearance and application requirements. By considering factors such as particle size, pigment characteristics, and formulation compatibility, customers can identify suitable grades for their coating systems.
Whether you are looking for leafing aluminium paste for a bright reflective finish or non-leafing aluminium paste for a more integrated metallic effect, selecting the right grade starts with understanding your application requirements.
Q1: What is the main difference between leafing and non-leafing aluminium paste?
The main difference is aluminium flake orientation. Leafing aluminium paste tends to concentrate near the coating surface, while non-leafing aluminium paste remains more evenly distributed throughout the coating film.
Q2: Which aluminium paste provides a brighter metallic effect?
Leafing aluminium paste generally produces a brighter, more reflective silver appearance because its flakes orient near the surface. However, the final brightness also depends on particle size, formulation, and application conditions.
Q3: Is non-leafing aluminium paste better for automotive coatings?
Non-leafing aluminium paste is commonly considered for automotive coating systems because it can provide an integrated metallic effect. The final grade should be selected according to the coating formulation and required appearance.
Q4: Can leafing aluminium paste be used in industrial coatings?
Yes. Leafing aluminium paste is used in selected industrial coating applications where surface reflectivity and metallic appearance are important. Compatibility and film performance should be confirmed through formulation testing.
Leafing and non-leafing aluminium paste serve different purposes in metallic coatings. Leafing types are generally selected for bright, reflective surface effects, while non-leafing types are often preferred when a more integrated metallic appearance and overcoating compatibility are required.
For coating manufacturers, the best choice is not simply the brightest or most widely used product. It is the aluminium paste grade that performs reliably in the intended formulation and application.
Contact Silver Rocket Metallic Pigment Co., Ltd. to discuss your aluminium paste requirements and explore suitable metallic pigment solutions.
Website: https://www.silverocket.com/
Email: info@silverocket.com