GANA Digs into Decorative Coatings

A panel during the decorative division included (left to right) Michael Saroka of Goldray, Chris Fronsoe of ICD and Jim Gulnick of McGrory.

The Glass Association of North America (GANA) continued its fall conference Wednesday morning with meetings on decorative glass and insulating glass. The event is being held at the Georgia World Conference Center in conjunction with GlassBuild.

During the decorative division meeting, a panel discussed trends in decorative glass and applications regarding decorative coatings. Much of the talk revolved around backpainted glass for the interior.

“It’s a market that has obviously grown hugely in the past decade,” said Michael Saroka of Goldray Glass. “More and more people are producing it because of the demand, and I don’t see that stopping.”

This growth has raised some issues regarding best practices as more glass businesses try to meet the demand. While suppliers such as ICD High Performance Coatings develop coatings specific for glass, and fabricators such as McGrory Glass specialize in decorative glass, the industry is concerned that some glaziers and shops may be applying paints that aren’t compatible with glass.

“It is seen by some as, ‘all we have to do is paint the glass,’” said Jim Gulnick of McGrory. “But they aren’t looking into the safety and chemical compatibility that goes with it.”

Chris Fronsoe of ICD said the safety consideration is critical, as adhesion to glass and coating compatibility is what ensures backpainted glass stays in place. Saroka added that one challenge with backpainted glass is that it’s “very application-specific,” and Gulnick pointed out other factors include color steadfastness and performance in guarding against UV damage. Another issue that was raised is that while the industry is concerned about proper adhesion with the coated glass, adhesion to the wall itself also needs to be considered.

The group discussed the possibility of developing a future standard specific to coated decorative glass adhesion, but that it could begin with a Glass Information Bulletin on the topic.

“A GIB focusing on aspects to consider in the safe installation of decorative coated glass would be good,” said Saroka, adding that the educational aspect would be “huge,” not only for glaziers but architects as well.

During the insulating division meeting later in the morning, Rainer Fuester of Viprotron discussed avoiding anisotropies in glass and quality control in an insulating glass line.

On the latter point, he discussed three independent channels to detect defects when the glass comes out of the washer but is still in monolithic form. “It’s like a screwdriver—not one screwdriver drives all screws,” he said. “It’s the same for defects in glass.”

The three methods include: “brightfield channel transmission,” which simulate a cloudy sky to find defects strong in contour; “darkfield channel transmission,” which simulates sunlight from the side to detect defects low in contrast; and the “reflection channel,” which simulates direct light reflections to find coating defects.

He also talked about the anisotropy effect in tempered glass caused by stress differences. His company developed a scanner that can detect anisotropy levels in glass, which can be visible in different conditions such as seaside locations or by certain angles of light before sunset.

He discussed the benefits fabricators get in measuring anisotropy during production, including improved glass quality, documentation and the saving of manpower.

Stay tuned to USGNN.com™ for continued coverage of the GANA fall conference.

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1 Response to GANA Digs into Decorative Coatings

  1. Enhanced durability and appearance of the surface and weather protection are some of the factors boosting the demand for decorative coatings from the real estate industry.

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