The Truth About ABS

ABS_The Evidence Part III The Truth About ABS - The Problem The Truth About ABS - The Symptoms The Truth About ABS - The Solution The Truth About ABS - The Critics The Truth About ABS - The Evidence I The Truth About ABS - The Evidence II The Truth About ABS - The Evidence III The Truth About ABS - The Truth The Truth About ABS - Testimonial
In the fall of 1998, a series of important tests were conducted by Professor Abdul Sadat, chair of the Industrial and Manufacturing Engineering Department at the California State Polytechnic University in Pomona, California. The research compared ABS Styran piano parts versus their wood counterparts with regard to strength, dimensional consistency, resistance to swelling and shrinking and longevity. The results were compelling.

ABS Styran hammer flanges were shown to be over 50% stronger
than wooden hammer flanges.
Benefit: Longer life of the piano

Fracture Load Analysis
ABS Styran piano parts were shown to be significantly more consistent in size and shape than wooden parts at the time of manufacture.
Benefit: Greater precision for superior performance
After only 24 hours of exposure to 90-100% humidity, wooden hammer flanges swelled by over 5% in size. In contrast, ABS Styran parts swelled by only 0.16%. Thus, ABS Styran parts proved to be 30 times more resistant to swelling than comparable wood parts.
Benefit: Without swelling/shrinking, action screws remain tight and hammers stay properly aligned for more consistent tone and touch over the life of the piano.
ABS hammer flanges taken from a 27-year-old used Kawai upright piano were shown to be significantly stronger than brand new wooden flanges designed for a grand piano.
Benefit: Better long-term durability and performance
"One of the most important findings of this study my be attributed to the dimensional tolerances at manufacture and the dimensional changes in environment as the wood parts proved to be inferior to ABS..."
– Dr. Abdul Sadat
This landmark research proved beyond all doubt that ABS Styran is superior to wood for specific uses within a piano action. ABS Superior

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