Abstract
Tests have been carried out on Kodak Spectroscopic Plates Type I-N, in order to find a treatment which could be easily applied to the infrared plates to be used with the Loiano 152 cm,f/8, Ritchey-Chrétien telescope. Different techniques have been tested, not only with the aim of achieving the higher speed gain, but also to obtain the better uniformity and reproducibility. Our results suggest that the advantages of preexposure techniques are underestimated in this respect. Furthermore, we find that blue and infrared preexposures (at 0.8 μs) give different results, suggesting a different degree of dispersity in the latent image produced by pre-exposure in the two cases.
Baths including both ammonia and Ag-compounds provide the higher speed gains, but the increment of the fog is often non-uniform and/or very high. The best results have been obtained with baths including AgNO3 and AgCl. The ‘rejuvenation process’ found by Sanduleak and the results obtained by Jenkins and Farnell on the reversibility of the gains due to silver-nitrate baths have been confirmed.
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Bònoli, F., Fusi Pecci, F. & Milandri, E. Hypersensitization of Kodak infrared plates: Results of some chemical methods and pre-exposure. Astrophys Space Sci 79, 191–201 (1981). https://doi.org/10.1007/BF00655916
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DOI: https://doi.org/10.1007/BF00655916