RESOLVOMETRIC CHARACTERISTICS OF SILVER-FREE IMAGES FROM METAL-CHELATES OF LIGANDS CONTAINING NITROGEN SULFUR

The resolving powers F (F = number of discernible lines per mm) of sil verless photographic images consisting of different iron, cobalt, nick el or copper complexes with some nitrogen/sulphur-containing ligands w ere measured. The resolvometric curves F = f (D) of the different silv erless images of the above-mentioned type (where D is the optical dens ity of neutral gray light filters used for exposure variation) and the resolution R as the maximum on this curve where determined. It has be en shown that the resolving power of the studied silverless images is lower in comparison with the initial silver images, excepting Cu(II)ch elates which have comparable values. This phenomenon could be explaine d by the different water solubilities of the chelate complexes forming the silverless images and the bigger size of the silverless image par ticles.