ASTM D2457

Introducing ASTM D2457 – Industrial Physics

ASTM D2457 is a global ASTM standard test method to measure the specular gloss of plastic films and solid plastics.  

Alongside its color, the specular gloss of an object is an important aspect of how we see and perceive it. Gloss is helpful for product and process development and performance testing. Manufacturers of plastic goods need to achieve consistent gloss levels on products and that’s why gloss testing standards such as ASTM D2457 are important.  

This ASTM standard method works for both opaque and transparent plastics and contains advice for gloss testing from the following gloss angles:  

• Recommended for intermediate-gloss films (60-deg) 
• Recommended for high-gloss films (20-deg)  
• Recommended for intermediate and low-gloss films (45-deg) 
• Recommended for intermediate and low gloss films (85-deg) 
• Recommended for plastic siding and soffit (75-deg). 

It’s well understood that you can only compare gloss values when they are measured using the same process and a similar material type. For example, comparing gloss values for transparent films can’t be compared with those for opaque films.  

The purpose of ASTM D2457 testing  

Specular gloss measurements are used to measure the shiny appearance of films and surfaces.  

Gloss is helpful in product and process development along with end-use performance testing. Gloss levels must be consistently achieved on products or different batches of products. 

The ASTM D2457 standard helps you to measure the specular gloss of plastic films and solid plastics. This reading can be inherent in the plastic, can be changed through texturing and molding, or it can be influenced by environmental factors such as weathering and surface abrasion. So the specular gloss values are influenced by surface smoothness and flatness. In fact, they’re sometimes used to compare these properties. 

To break down the process – using a glossmeter, a beam of light is projected at a specified intensity and angle onto the plastic sample. The amount of reflected light at an equal and opposite angle is then measured to determine the gloss value. Sounds easy? Well, it’s a lot simpler with an Industrial Physics glossmeter! 

A glossmeter will measure the gloss of a wide range of different surfaces. Within plastic gloss testing there are three main angles used to cover the range of gloss: 20-degrees, 60-degrees and 85-degrees. While some industries, such as paper or ceramics, define their own degrees.  

ASTM D2457 testing equipment  

So, how can Industrial Physics improve your ASTM D2457 testing?  

Glossmeter – Sologloss & Polygloss  

Our portable precision glossmeters are for production and laboratory settings. It is just what you need for glossmeter testing of automotive parts, paints and coatings.  

This reliable glossmeter has a large memory capability; it will hold up to 2,000 readings with adjustable gloss limits. It features a visual and acoustic alarm and a calibration gloss standard integrated in a protective holder.   

We ensured the quality of our glossmeter by taking thousands of readings on certified substrates to test stability, reliability, and durability – so you can be sure it will meet your needs.   

TQC Sheen PolyGloss 20° / 60° / 85° 

Our specialist paint testing brand ‘TQC Sheen’ makes two glossmeter models, both of which support your ASTM C584 testing: first up is the highly accurate Polygloss glossmeter, for angles of 20°, 60° and 85°.  

TQC Sheen SoloGloss 60° 

The second accurate gloss testing device made by TQC Sheen is the Sologloss glossmeter, with a 60° measuring angle for any surface – from mat to glossy.  

Your global test and measurement partner for ASTM D2457