Transparent Sheets Reply

Light weight and high design flexibility make transparent plastic sheets attractive for use as “organic glass” in many different applications, e.g., noise barriers, green houses, sport arenas, sky domes, solar panels or bus stop shelters. In addition, rigidity and impact resistance of acrylic (PMMA) and polycarbonate (PC) sheets were optimized expanding its usage for safety and architectural glazing as well as for automotive, aircraft, yacht or caravan applications. Depending on the application, the transparency requirements will be very different and need to be objectively controlled – often within very tight specification. More…

Quality Control for Injection Molding Reply

In plastics processing injection molding is the most common method of part manufacturing. The variety of molded parts produced by injection molding extends from smallest components like cell phone buttons up to entire body panels of cars. Plastic moldings are manufactured in production batches of up to several million. In addition to dimensional stability, color and gloss are the decisive quality criteria.

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Quick and Inexpensive Color Measurement of Metal Surfaces Reply

Metal Production Tanks. Photo courtesy of Altana.

Metal Production Tanks.
Photo courtesy of Altana.

Metallic surfaces can be difficult to quantify for color.   The color measurement varies dramatically with the angle that you view it. For this very reason BYK-Gardner developed the BYK mac i multi-angle color instrument. It measures the color and sparkle of the metal and other effect surfaces at 6 different angles and even quantifies how much sparkle there is on the surface.

However, this is just too much information for basic color quantification of bare metals, building materials or inexpensive household or automotive accessories. More…

Measuring the Light Reflectance Value (LRV) and its Importance in Safety Regulations 1

BYK-Gardner spectro-guide. Photo courtesy of BYK-Gardner.

BYK-Gardner spectro-guide.
Photo courtesy of BYK-Gardner.

The BYK-Gardner color-guide and spectro-guide contain many common and useful color indices. One can change the instrument to most of the widely used color systems: CIE, Lab (hunter), Spectrum, XYZ, Yxy, FMC2 and others. You can also change the instrument to a number of different indices to measure color difference, whiteness, yellowness, opacity and strength. But nowhere in these lists are any indications of the LRV of the color you are measuring. More…

Using the Grey Scale in Fabric Evaluation Reply

Measuring color for an interior automotive application with a spectra-guide-S. Photo courtesy of BYK-Gardner.

Measuring color for an interior automotive application with a spectra-guide-S.
Photo courtesy of BYK-Gardner.

A recent addition to the spectro-guide’s list of color indices is the Grey Scale. The Grey Scale is one of the most important tools to evaluate color shading and staining, and is widely used by the automotive industry to measure the fade of the fabric in a vehicle’s interior. It is based upon both ISO and AATCC specifications. More…