Video color printer

TLC with Merck silica gel 60 TLC plates and hexane-methyl ethyl ketone-ethyl acetate (80 3 17) mobile phase was used successfully to analyze 81 different samples, which included 54 thermal transfer printer samples (43 photographic prints on paper and 11 plastic card samples) and 27 printer ribbons, with excellent resolution of the colors. Pyridine was used for extraction of 5 mm hole punches from paper samples, 5x5 mm cuttings from ribbons, and scalpel scrapings from cards. Developed plates were examined in daylight and under 254 and 366 nm UV light, and a Foster and Freeman, Ltd. (Evesham, Worcestershire, UK) Video Spectral Comparator 2000 High Resolution (VSC 2000 HR) was used to document and record the TLC plates in black and white and color modes, and to observe and record IRL properties on the TLC plate produced from the D2T2 (dye difrusion thermal transfer) process dyes and/or overlays. 

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