Wednesday morning’s session opened with two papers on the conservation of the New York Public Library. The latter presentation focused on the conservation of the sculptural elements from the Library.
Rabinowitz and Carr present the conservation of sculptural elements at the New York Public Library
The New York Public Library — marble deterioration and conservation, Mark Rabinowitz and John Carr
This talk highlights the existing conditions and scope of work on the marble sculptural elements on the New York Public Library. Laser cleaning was done on some pediment groups using an ND: YAG laser.
Pediment sculptures were the most severely deteriorated conditions. Because of the shelter areas, dry deposition from sulfur dioxide took a heavy toll on the sculptures. Extensive patching was needed to reintegrate the readability and improve structural strength of sculptural elements. in many places a patching material called Lithos Arte was used rather than stone dutchmen. In some areas dutchmen made of Vermont marble were used in the upper parts of the pediment sculpturess.
Cleaning treatments included water misting, poultices, and chemical cleaning. Conservators used ammonium oxalate to consolidate the stone. After cleaning, they applied a custom matched lime shelter coat and installed bird netting. Details for the conservation of the fountains and urns were also given.