JAIC 1997, Volume 36, Number 3, Article 1 (pp. 183 to 192)
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Journal of the American Institute for Conservation
JAIC 1997, Volume 36, Number 3, Article 1 (pp. 183 to 192)

THE CONSERVATION OF A PAINTED BALTIMORE SIDECHAIR (ca. 1815) ATTRIBUTED TO JOHN AND HUGH FINLAY

PETER L. FODERA, KENNETH N. NEEDLEMAN, & JOHN L. VITAGLIANO



4 TREATMENT

The chair was cleaned in three basic phases, first removing the topcoat with xylene. The makeup of the topcoat and its removal were discussed in sections 2 and 3. The most recent and easily removed retouchings were also cleaned from the surface at this time. After the topcoat was removed, we were faced with tackling the stubborn discolored layer. One almost never has the luxury of a uniform substrate surface on an object of this kind, and it was important for us to treat only a small area at a time, defining as precisely as possible each successive area to be cleaned. The presence of the resinous coating beneath the discolored layer and on top of the original paint allowed for a successful removal of the discolored layer. We had to keep in mind that there were interruptions in the resinous layer and certain areas of paint would therefore be somewhat less protected. We gelled 7% and 14% ammonium hydroxide solutions with Carbopol 940 resin and used them to remove the stubborn layer wherever the surface allowed. Repeated examinations under UV guided us during the cleaning process. The gel was immediately cleared with water, and the treated area was rinsed with mineral spirits. Overpaint was removed with a scalpel wherever the original paint surface was devoid of its resinous coating and cleaning with the gel appeared to be unsafe.

Cleaning allowed a reevaluation of the scope of the original design scheme of the klismos chair. Great delicacy and assuredness in the execution of the painted decoration and the abundant use of archaeologically inspired trompe l'oeil effects through careful attention to shadows rendered with transparent glazes are two of the striking features of the chair's design that could not have been fully appreciated for some decades (figs. 13, 14).

Fig. 13. Detail of proper left rear leg after cleaning

Fig. 14. Detail of proper left front leg after treatment

Our goal in the filling and inpainting stages of treatment was to strike a balance between allowing the history of wear on the piece to show and making the complexity and sophistication of the design understandable. Filling was accomplished with a traditional gesso made of whiting and rabbit skin glue. This procedure provided us with a white ground that functioned like the original white underlayer, giving light and clarity to the inpainted passages (fig. 15). Many of the voids to be filled contained residues of older, deeply entrenched oil paint that could not be safely removed. Areas of loss were isolated with a thin coating of Acryloid B-67 prior to filling.6 Excess fill material was removed with saliva and cotton swabs, and the surface was leveled with a scalpel. Inpainting was executed with water-color, followed by dry pigment in poly(vinyl acetate)-AYAB. Color saturation and surface gloss in the reconstructed areas were adjusted with damar stabilized with Tinuvin 292.

Fig. 15. Kaufman chair after treatment

Applying a finish coat to the chair was somewhat problematic. Test applications of different varnishes (e.g., Arkon, damar, B-67) accentuated the surface wear along the edges and interrupted the flow of the design elements. As the surface of the chair had the appearance of a thin, worn, original surface coating, it was decided that a thin coating of wax would provide some protection and at the same time help to integrate the restored areas. Comparison with the Kaufman card table assured us that their surface appearances would be similar. The chair was finished with a thin application of microcrystalline paste wax and buffed with cotton pads.

While we feel we can safely say that we have come somewhat closer to understanding the chair's surviving original painted decoration, the question of original surface appearance lingers. It remains to be seen whether we will in the future be able to make a more accurate assessment of the degree of surface gloss the chair was meant to have.


ACKNOWLEDGEMENTS

Thanks to Morry Heckscher, Peter Kenny, Mark Wypyski, and James Martin for their input during the project; to Gregory Weidman and Wendy Cooper for their exceptional scholarly contributions; to Martha Rowe for her research assistance; and to George and Linda Kaufman. The contribution of their efforts and insights not only ensured a successful outcome but also served to broaden our common understanding.


Copyright 1997 American Institute for Conservation of Historic and Artistic Works