The Steinway Parts Department sells red vulcanized fiberboard in sheets of 25" x 40". (Part number 007999)
Original Message:
Sent: 04-22-2025 07:52
From: Dave Conte
Subject: Steinway treble understring card
Denis, would you mind sharing where you sourced your stock?
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Dave Conte, RPT
Piano Technician in Residence
The University of Tennessee
College of Music
Knoxville TN
(817) 307-5656
Owner: Rocky Top Piano
Original Message:
Sent: 04-21-2025 16:47
From: Denis Kelly
Subject: Steinway treble understring card
Thank you, David,
I have sourced the understring material and it is on the way to me, but I appreciate your offer very much.
Denis Kelly
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Denis Kelly
Original Message:
Sent: 04-21-2025 07:27
From: David Hughes
Subject: Steinway treble understring card
Dennis,
This material is referred to as vulcanized paper or vulcanized card stock. Steinway's Parts Department used to sell it to the trade by the sheet. I may still have a portion of a sheet.
David G. Hughes, RPT
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David Hughes RPT
Vintage Case Parts
Glyndon MD
(443) 522-2201
Original Message:
Sent: 04-20-2025 00:20
From: Denis Kelly
Subject: Steinway treble understring card
Hi All,
I am restringing my personal piano, a 1927 Steinway L. Although I have restrung several other pianos, I have not come across the "card" which is was glued to bottom of the treble understring felt. I've attached several photos. I am asking the group what material to use as a replacement for this card. It appears like it could be heavy card stock, but after nearly 100 years, I can't be sure. Suggestions?
Thanks,
Denis Kelly
San Anselmo, CA