CN, I wouldn't put too much emphasis on the actual names of the mixing tints. I personally don't think they are an accurate measure of the final color shade. Plus, it also depends on the relative quantities of each. As Frank says, the mixing tints are somewhat unique to different products, even for the same color formula. For example, here's the listing of the names of the mixing tints for three DuPont chemistries, all are for the formula 96766 that is called "Red": Centari Acrylic Enamel: 758S DRIER 706A BLACK 716A RED/ROUGE 733A RED ORANGE 701A WHITE 715A RED/ROUGE ChromaOne SS Urethane: 884J LS RED OXIDE 850J BRILLIANT RED 886J OPAQUE RED 869J CABERNET RED 7020G BINDER NASON FulThane SS Urethane: 430-18 ORANGE 430-56 RED VIOLET 430-17 YELLOW 430-04 WHITE 435-91 URETHANE BINDER I am not sure why the above for Centari does not agree with Frank's listing or what his reference to #7410 is - he just may have used it as a random sample. There are also two other "alternates" in Centari for the same formula above, each with slightly different mixing tints and/or quantities used. The above comes from DuPont's on-line color formulas. I don't have access to PPG's on-line formulas so I can't compare their tint names. The cross reference info I have indicates DuPont 96766 crosses to PPG 71310 and that DuPont 7410 crosses to PPG 71969. Complicated ain't it! It's my conclusion that you simply cannot get an accurate idea of subtle shade differences by looking at the common names of the tints that make up the final product. The only thing that really counts is a final sprayout, keeping all variables as close to constant as possible. The closest DuPont match that I have seen to the early AC persian orange that I use is DuPont formula YS074. It's a generic color called Spectramaster Yellow but I would never refer to it as a yellow. I would certainly call it an orange though. I don't have any explanation why yours might change shade after drying. I can't say I have ever experienced anything like that that was obvious at the time. I do know that in different lighting situations color shades can appear differently. And digital cameras can sometimes confuse shades of color. In some lighting, a digital photo of my AC can show yellowish-orange and reddish-orange in the same picture due solely to the way light strikes different areas of the picture. It's something I don't see with my eyes - at least not to such a dramatic extent. If you have any other jobbers for the 71310 OMNI in your area, I would try a small quantity from a second source. You may just have a supplier that is too casual in his or her mixing practices. There was an interesting discussion recently on one of the auto-painting forums about the large numbers of painters that either love or hate OMNI. There were even suggestions that some jobbers might be intentionally less than accurate in mixing the "value" paint line for some economic reason. I'm not making that charge because I don't have any personal basis for it. However, I am aware of quite a few who say that OMNI is the worst piece of crap ever, even on this forum. I don't believe that because I have had excellent luck with it. It seems to be love or hate with nothing in between. I know some of the reasons for hate can be attributed to not following instructions but I also know that you are not in that category. You might also consider getting a small quantity of the 71310 in a higher grade product such as Concept Urethane (Deltron Acrylic Urethane SS), if it's available in that, and trying a sprayout for comparison purposes.
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