Color travel

Measuring For each strip, measure the distance the solvent traveled from the pencil line (Df). For each color, measure from the top of the original marker dot to the farthest point the color traveled (Ds). Record these values in your data table. 

Rf = distance the component color traveled from the point of application distance the solvent front traveled from the point of application... 

Pearl luster pigments are used to obtain pearl, iridescent (rainbow), or metaUic effects, and in transparent color formulations to obtain briUiance or two-tone color, luster flops, and color travel effects (changing with viewing angle). The most important appUcations are plastics, industrial coatings, printing inks, cosmetics, and automotive paints. 

Fig. 5.24 Angle-dependent color travel of Fe203-coated silica flakes of different thickness.

The aluminum flakes can be coated with aluminum oxide and/or silicon dioxide in the liquid phase before the CVD process to reduce the reactivity of the metal and to create multilayer color effects. These pigments show strong angle-dependent coloristic effects (color travel) [5.158]. Metal halogenides are difficult to use as gas-phase precursors for metal oxide coating because of the reactivity of the metal flakes and the corrosion of steel in chloride atmospheres. The use of TiCU and water vapor was described about ten years ago. However, no commercial products have, as yet, been introduced. 

Special effect pigments are used as colorants or part of color formulations for all systems where traditional pigments are applied, but where additional color depth, brilliance, iridescence, color travel, and other spectacular effects are required [5.122, 5.123]. Mica-based pigments dominate their combination of pearl and interference effects, brilliance, stability and behavior in different application systems is as yet unsurpassed. Pearl luster pigments require transparent or at least translucent binders. Formulations with absorption pigments have to take their transparency and color mixing rules into account... 

Only some figures for the set of 100 realizations with a standard deviation of 0.6 are shown. Figure 6 shows the cumulative distributions of flow resistances obtained with the one hundred realizations, flow in the upscaled fields (darker color) travels faster than in the small-scale fields, basically due to the smearing effect of upscaling. 

In 1994, we decided to evaluate a multi-angle spectrophotometer from X-rite Incorporated, to see if the instrument would be able to measure and thus better characterize what we see visually. We felt that if we could measure color at the flop angles we could compare various submissions and formulate better matches with regards to both flop and color travel. 

Morton, J. L. (2011). Color Matters. Retrieved 21 January 2012 from the World Wide Web http //www.colormatters.com/color-travels/pakistan. 

Color Changes Depending on the Viewing Angle Strong Color Travel even under Subdued Light Conditions... 

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