Reversal film

Metallopolymer films have also been prepared by oxidative polymerization of complexes of the type [M(phen)2(4,4 -bipy)2]2+ (M = Fe, Ru, or Os phen= 1,10-phenanthroline, 4,4 -bipy = 4,4 -bipyridine).23 Such films are both oxidatively and reductively electrochromic reversible film-based reduction at potentials below —IV lead to dark purple films,23 the color and potential region being consistent with the viologen dication/radical cation electrochromic response. A purple state at high negative potentials has also been observed for polymeric films prepared from [Ru(L13)3]2+.24 Electropolymerized films prepared from the complexes [Ru(L16)-(bipy)2][PF6]22 and [Ru(L17)3][PF6]226,27 exhibit reversible orange/transparent electrochromic behavior associated with the Run/Ruin interconversion. 

The overall compositions of films 2 and 4 was such that homogeneous alloys were not expected, and the X-ray diffraction peaks showed evidence of phase-separation with two maxima corresponding to the compositions recorded in column 8, Table II. When palladium was deposited on top (and the film was rather light) then the apparent surface composition after annealing was 10% Rh and X-ray diffraction indicated a phase also containing 10% Rh (film 2). This convenient result was not observed when the order of deposition was reversed (film 4). These differences between apparent surface composition and the overall composition of the homogeneous alloy (or one of the phases in the miscibility gap) are discussed in Moss and Gibbens (34), with further examples. The main point to be made here is the rather variable nature of the surface composition compared with that expected, due to the operation of a number of factors. 

Reciprocity failure of the film has two practical implications. The first is seen with the use of color-reversal film. Each of the three color-sensitive layers of the film has a different reciprocity failure factor resulting in incorrect color reproduction during long exposures. To correct for this problem, color-compensating filters can be placed in the light path to the camera. 

The two basic types of colour film are the colour reversal film for transparencies and the colour negative film used to produce prints on colour papers. 

The basic structure of a colour negative film is the same as in a colour reversal film, with the relevant colour coupler incorporated into each layer. The difference between the two films is that after development the dye image, is complementary to the final colour required in the resultant hard copy print (see Figure 2.28). 

Figure 2.27 Schematic of colour reversal film and E-6 processing.

Figure 3.6 Film structure of the FUJICHROME 64T Type II Professional color reversal film (from Fuji Photo Film Co., LTD. 2005a). Reproduced by permission of FUJIFILM.

He throws the gloves at Orpheus. Orpheus catches them, hesitates for a moment, and puts them on. (The action in the following scene is shown through reversed film.)... 

AGFA Scala 200 ASA (reversal film for black and white transparencies). 

Uses color developer for Eastman color-negative film and Ektachrome reversal film color developer for use in color microautoradiography for color development of immunogold-labeled antibodies A... 

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