JAIC 2005, Volume 44, Number 2, Article 2 (pp. 75 to 94)
JAIC online
Journal of the American Institute for Conservation
JAIC 2005, Volume 44, Number 2, Article 2 (pp. 75 to 94)

EVALUATION OF APPEARANCE AND FADING OF DAYLIGHT FLUORESCENT WATERCOLORS

SANDRA A. CONNORS-ROWE, HANNAH R. MORRIS, & PAUL M. WHITMORE


ABSTRACT—Twelve daylight fluorescent watercolors from the Dr. Ph. Martin Radiant Concentrated Water Color line of products were studied to evaluate their appearance and light sensitivity under various lighting conditions—high and low correlated-color-temperature sources, simulated daylight sources with ultraviolet light both included and excluded, and black light. The appearance tests showed that all watercolors experienced a significant reduction in fluorescent emission when a low correlated-color-temperature light source was used compared to a high correlated-color-temperature source. Only a slight change in appearance was experienced by five of the watercolors studied when UV wavelengths were excluded from a simulated daylight source, while others experienced no change at all. Nine of the watercolors showed a significant reduction in fading rate during prolonged exposure to simulated daylight from which the UV content was excluded. Black light exposure produced fading patterns similar to those found with simulated daylight exposure. However, some of the watercolors were relatively stable when exposed to black light compared with their fading rates when exposed to simulated daylight. The conservation issues related to fluorescent materials, including difficulties with matching color and inferring original appearance, were also examined. Six of the 12 watercolors showed promising results for the possibility of using dilutions of the original fluorescent material to match faded versions of that watercolor.
[Spanish Abstract] [French Abstract]

Article Sections:

1. INTRODUCTION
2. FLUORESCENT COLORANTS AND THEIR APPEARANCE
3. LIGHTFASTNESS UNDER DIFFERENT LIGHTING CONDITIONS
4. CONSERVATION ISSUES
5. CONCLUSIONS
a: Appendix , Notes , Materials , References , Author Information
Entire Article

Copyright 2005 American Institution for Conservation of Historic & Artistic Works