jrjerin,
Maybe if you took some time to explain what platinum JD is, you would get a few responses. You keep bumping this thread like there are 1000's of people who have tried and they are just ignoring you.
From what I have seen, "Platinum Jack Dempsey" is a marketing name for Jack Dempsey that are both Electric Blue and Gold. So they have the lighter base pattern of the Gold JD (hypo melanistic) with the extreme blue metalic overlay of the Electric Blue JD (hyper cyanistic). So these are pure bred JD's with a combination of two extreme color forms into one fish. This is a relatively new color form and few people are raising it as there are only a couple breeders who have them. The only decent picture of an adult I have seen is by the guy selling some on Aquabid.
If we take what we know about the two color forms, we can evaluate the likelyhood of this cross being successful.
Both the Gold & Electric Blue traits are recessive traits. For golds you can breed two gold parents and get healthy gold fry, and there is always a concern with too much inbreeding, but in general there are no issues for the Gold side of the equation. For the Electric Blue trait, it has been tested by many breeders with similar outcome that when you breed electric blue to electric blue, the eggs never hatch or all the fry die before the end of the first month. The thought is that there is some genetic weakness that comes with the electric blue gene. Many breeders have found that breeding two BG's (blue gene carriers but normal looking JD's) produces the strongest electric blue fry.
So for platinums that have both genes, I would expect two platinums act like two electric blues and not be able to produce viable fry. This is just a guess based on what we think we know about them, but as I said they are still too new to know for sure.
Regards,
Patrick