Hi passionate4nature,
This is actually the other way around and the Talalay would come from Latex International and the Dunlop from Latex Green.
I really don’t think there is such a thing as “fake” latex Unless it is polyfoam that is being described as latex) and all latex is a good quality material compared to other foams as long as it really is latex. I would very much doubt that the material in your mattresses isn’t what is on the law tag. To tell for sure though you would need to remove the cover and take it to someone that was familiar with latex or perhaps even specific types of latex and I think the only thing you would probably accomplish is finding out that it really is latex after all. I think your “worry” is probably needless.
Both types of latex that are probably in your mattress are poured in a mold (not “finished” in a mold) but even continuous pour latex that is poured on a belt is a good quality material … although I doubt that that is what is in your mattress.
Don’t forget too that “comfort” ratings like soft, medium, and firm are very subjective and different people may rate the same materials differently when they are using “word ratings”. Most consumers really wouldn’t have the experience to accurately “rate” the firmness of a latex layer although in most cases they could probably tell which one was firmer of sorter than the others as long as they weren’t too close together in firmness/softness.
It’s possible that the latex was exposed to ultraviolet light or ozone which could oxidize it and make it “brittle” (see the pictures here) but the layers are covered so this isn’t likely either.
If you can see or feel the pincores through the covers then it’s almost certainly “real” latex and most likely from the sources that their website mentions.
No … Latex Green makes 100% natural Dunlop (then and now). Latex International makes a 70% synthetic / 30% natural blended Talalay as well as a 100% natural Talalay. 5 years ago there was no latex made that had an organic certification.
If you did want to take one of the layers to a local manufacturer to ask their opinion … then the San Francisco list is in post #2 here and if you took your layers to any of them that worked with latex they could probably confirm whether your layers were latex and if they were familiar with the specifics of your layers they may even be able to tell you which type it is.
Phoenix