Asbra Safety Stair Treads & Nosings Luminance Contrast Testing Information

Asbra Safety Stair Treads & Nosings Luminance Contrast Testing Information

Latham Australia has independent testing carried out by a NATA accredited laboratory

View and download our luminance testing information PDF

Luminance Contrast Testing for Latham Tread Infills Luminance Contrast Testing for Latham Tread Infills (144 KB)


Latham Silicon Carbide inserts for Treads have been independently tested by The University Of New South Wales Optics & Radiometry Laboratory School of Optometry and Vision Science, a National Association of Testing Authorities (NATA) accredited facility in accordance with Appendix B of AS 1428.1-2009 (specifically Clause B3 Measurement of Luminance Contrast – Laboratory) for dry and wet applications.

Instrument used: Spectrophotometer calibrated by a NATA Accredited Calibrating Authority, which complies with Clause B3.2 of AS 1428.1-2009.

Method: Eleven measurements were made on the tread section (aluminium or brass retainer) and the infill of each sample and the mean value calculated. The total area of each sample was determined along with the area of tread (retainer) and infill. The mean luminous reflectance of each sample was then determined from the sum of mean luminous reflectance of each component, as a proportion of the area as calculated above. Measurements are made in wet and dry states.

View Results

 

Determination of Luminance Contrast.

AS 1428.1-2009 under Appendix B (informative) sets out the method to determine the minimum Luminance Contrast between 2 adjoining surfaces by using their luminous reflectance values. The Standard refers to the Bowman-Sapolinski Equation (An Improved Metric for Visual Differentiation using Colour-modified Clinical Eye Charts, Redeemer Baptist School North Parramatta Australia Sapolinski,J., August 2009.).

It is important to note that this Appendix B of AS 1428.1-2009 is Informative, Standards Australia publication Standardisation Guide 003: For Standards and Other Publications, has the following definition for the term informative. 

Informative is a term used to describe an element (clause, note or appendix) of a Standard that gives additional information, recommendations and/or guidelines, i.e. is of a non-mandatory nature. Where a Standard contains both mandatory and informative elements, the informative material is usually aimed at explaining the mandatory requirements and helping the user to understand and comply with the Standard.
 


A copy of the full NATA Accredited Testing Facilities results are available by contacting Latham Australia.

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Colour Description Dry Luminance Reflective Value Wet Luminance Reflective Value
All Black Latham Suregrip™ Insert (Striped) 5.00%

4.34%

All White Latham Supagrit™ Insert (Striped) 45.76% 46.58%

Colour Description Dry Luminance 
Reflective Value
Wet Luminance 
Reflective Value
Black Latham Suregrip™ Insert (Striped) 28.99% 28.89%
Teal Latham Supagrit™ Insert (Striped) 31.19% 31.94%
Blue Latham Supagrit™ Insert (Striped) 32.01% 32.91%
Brown Latham Supagrit™ Insert (Striped) 32.75% 32.30%
Terracotta Latham Supagrit™ Insert (Striped) 34.18% 33.55%
Teak Latham Supagrit™ Insert (Striped) 35.75% 35.26%
Cactus Green Latham Supagrit™ Insert (Striped) 36.16% 326.02%
Blue Grey Latham Supagrit™ Insert (Striped) 37.11% 36.02%
Silver Grey Latham Supagrit™ Insert (Striped) 37.79% 37.67%
Buff Latham Supagrit™ Insert (Striped) 40.81% 41.48%
Safety Yellow Latham Supagrit™ Insert (Striped) 41.41% 40.40%
Off White Latham Supagrit™ Insert (Striped) 50.17% 48.26%
Lumo Glow in the Dark Latham Supagrit™ Insert (Striped) 51.62% 53.06%

Colour Description Dry Luminance 
Reflective Value
Wet Luminance 
Reflective Value
Black Latham Suregrip™ Insert (Solid 50mm) 4.45% 3.69%
Brown Latham Supagrit™ Insert (Solid 50mm) 6.19% 8.63%
Blue Latham Supagrit™ Insert (Solid 50mm) 7.51% 7.73%
Terracotta Latham Supagrit™ Insert (Solid 50mm)  8.33% 8.05%
Cactus Green Latham Supagrit™ Insert (Solid 50mm)  11.58% 11.01%
Teak Latham Supagrit™ Insert (Solid 50mm)  12.31% 12.02%
Teal Latham Supagrit™ Insert (Solid 50mm)  15.49% 14.74%
Blue Grey Latham Supagrit™ Insert (Solid 50mm)  16.71% 18.44%
Silver Grey Latham Supagrit™ Insert (Solid 50mm)  18.71% 16.61%
Buff Latham Supagrit™ Insert (Solid 50mm)  21.15% 21.35%
Safety Yellow Latham Supagrit™ Insert (Solid 50mm)  22.69% 22.20%
Off White Latham Supagrit™ Insert (Solid 50mm)  36.56% 36.01%
Lumo Glow in the Dark Latham Supagrit™ Insert (Solid 50mm)  38.75% 39.08%

Colour Description Dry Luminance 
Reflective Value
Wet Luminance 
Reflective Value
Black Latham Suregrip™ Insert (Striped) 18.66% 17.76%
Brown Latham Supagrit™ Insert (Striped) 19.55% 22.59%
TerracottaLatham Supagrit™ Insert (Striped) 20.92% 20.41%
Blue Latham Supagrit™ Insert (Striped)  21.56% 22.94%
Cactus Green Latham Supagrit™ Insert (Striped)  24.02% 23.04%
Teak Latham Supagrit™ Insert (Striped)  24.18% 24.29%
Teal Latham Supagrit™ Insert (Striped)  25.86% 25.47%
Blue Grey Latham Supagrit™ Insert (Striped)  26.44% 28.36%
Silver Grey Latham Supagrit™ Insert (Striped) 37.25% 25.42^
Buff Latham Supagrit™ Insert (Striped)  27.52% 26.68%
Safety Yellow Latham Supagrit™ Insert (Striped)  30.57% 30.53%
Off White Latham Supagrit™ Insert (Striped)  37.67% 38.75%
Lumo Glow in the Dark Latham Supagrit™ Insert (Striped)  40.82% 40.31%

Colour Description Dry Luminance Reflective Value Wet Luminance Reflective Value
Black Latham Rufazel™ Product 3.85% 3.14%
Yellow Latham Rufazel™ Product 45.76% 46.58%

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