Further Sugaestions on PresentationSlides -There is considerable i n t e ~ e s t ' .in ~ the presentation of slides with a blue background and transparent text. Lyle3 reported a simple m e t h d employing color print film; however, more density of color in the background may be desirable. Films for color orints oraduce low contrast as the" are iust a n intermediate in the oracess to oroduce mints. The use of films intended ior color slides will improve the resilts noticeably. Costs will also riseahout loo%, hut t h i y will still remain ineunansive. - ~ -~~ - ~ To make slides the Lyle' method should be lollowed, but, instead, obtain a standard roll of color slide film, shoot the slides with n Cokin A0002 orange filter (other colored filters will produce other interesting colors), and send the roll to be developed using the Kodak C-41 proress (which is normally used to develop rolor prints films) but ask for no prrnrs. You should find a positive difference with this modification
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'Wright, N. A,: Ellevins, D. D. J. Chem. Educ 1984, 81. 800 Hunt. H. R. J. Chem. Educ. 1985, 62, 1097. Lyle. J. L. J. Chem. Educ. 1985,82,222.
Gabriel Garcia Departamenlo de Quimica lnorgknica
Coiegio Universitario de Burgos 09002 Burgos, Spain
862
Journal of Chemical Education
