Hey everyone, I feel I should clarify some of the details in this thread.
1) Indeed there is a Deck Francium. We actually had some prototypes in the office. We did not announce it at the time because Deck was unsure if they would 'skip' over it in favour of another TKL model. I guess now that it's starting to appear here and there, there's no harm acknowledging it.
2) The US ANSI Deck Hassiums do use DS-PBT as seen in our picture. However, we have it on good accounts that the Korean versions of Hassium used ABS since the molding process could not be quickly / cheaply adapted to different fonts (i.e. non-deck font, Hangul layout). This may have changed, we are not experts in the Korean market so the only way to know for sure is if someone gets word from Deck or some gets their hands on one.
3) Ducky Shine key caps were not used in our experiment, the black 'outline' is the left-overs from the Mionix ABS which seeped onto the tissue. We did not use a Ducky Shine key cap in our tests but I doubt the result would be much different from the Mionix ABS since the material should be the same.
Any questions, let me know. I will do my best to answer.