What is Exposure?

There are two main types of Exposure Testing: Outdoor exposure testing and accelerated weathering testing using an artificial light source.

Outdoor Exposure Testing
The way to see how climates actually affect specimens installed outside. Exposing plastics, rubbers, metals, and coatings used for vehicles and building materials to outdoor daylight causes deformation, discoloration, rust, and other kinds of deterioration. Those materials must have long-term durability, and it is important to know how materials are affected by exposing them to outdoor environments and the durability of the materials. Exposure testing refers to testing that is performed to determine the durability of materials.
According to JIS Z2381 (General requirements for atmospheric exposure testing), exposure testing is defined as, "A test exposing materials under atmospheric or shielded environments to evaluate their chemical and physical properties and changes."

Pros:This test reproduces results more accurately.

Cons: It requires an extensive amount of time.

Accelerated Weathering Testing Using an Artificial Light Source
To reproduce the conditions of the indoors and outdoors such as sunlight, temperature,
humidity, and precipitation artificially, thereby facilitating degradation to predict the lifespan
of products and materials quickly.

Pros:It can be experimented based on short term.

Cons:It is hard to assess deterioration through general usage accurately.

As such, we are striving to build a more accurate method assessment by designing our outdoor exposure testing and accelerated weathering testing to gather more data over a longer time period.

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Are You Running into These Type of Issues?

There are different types of deterioration. Through the use of exposure testing, we can assess the conditions and amount of time it takes for a product to deteriorate. As a precaution against product failure and factors contributing to failure, we assist with resolve any issues you have, and engage in the research and development of new products. Feel free to contact us.

Click pictures to see more details

Yellowing

Yellowing

Peeling

Peeling

Loss of gloss

Loss of gloss

Plating pit

Plating pit

Stains

Stains

Rust

Rust

Chalking

Chalking

Cracking

Cracking

Main Causes of Deterioration

What then, are the causes of deterioration? It is not merely the passage of time that is involved. Deterioration is also influenced by things such as UV, heat, and the natural environment.

Main Causes of Deterioration

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Yellowing
Yellowing
A phenomenon that partially or wholly changes the color of plastics and coatings from their original state. It is caused by heat, ultraviolet, and the separation of ingredients inside materials.
Peeling
Peeling
The loss adhesion of coating films and separation of films from base materials such as steel plates, plastics, undercoat paint, or the coating surface.
Loss of gloss
Loss of gloss
Over time, pigments or resins deteriorate and coating film becomes lusterless, and loses its gloss (resulting in a decrease in gloss value).
Plating pit
Plating pit
Macroscopic holes that may be present on the surface of plating films. The promoting factors of development are moisture, halogen, acid, dust, etc.
Stains
Stains
A phenomenon that causes damage to coating films and ingenerate changes of color by adhesion when allowing an acid or alkali substance, moisture, solvent, bird dropping, tree sap, compound, or wax to attach to a coating surface for an extended amount of time.
Rust
Rust
A film such as oxide or carbonate, occurring on the surface of metals affected by moisture and oxygen in the atmosphere. Examples include, red and black rust on metals, cupper patina, etc.
Chalking
Chalking
The formation of a white, chalky powder on the surface of paint films due to light, heat, and moisture, causing a loss of gloss.
Cracking
Cracking
Visible lines that indicate breaks and splits on coating surfaces, plastics, rubber, etc. on materials which can no longer withstand hot or cold conditions after becoming hard and brittle due to light, heat, moisture and solvents.