It seems that I "may" have dominants on my bass - the nice site
http://www.quinnviolins.com/stringidfier.htm says that a string with purple at each end is likely to be a set of dominants.
I am a little sceptical as the bass is (a nicely done) carved 4/4 5 string from Jin yin (China). Aparrently their luxury model. He he. Would they fit thomastic as factory strings?? Hard to believe.
Do you have any hints for me to determine the lineage of these mystery strings I have? They seem powerful (I play mostly arco) and don't require a very high action at all which is nice, but are quite scratchy on the G and D which has had me change rosin to a less grippy formula. Still playing them in (2 months now) and need a little nip to tighten every now and then. I will try and get a photo of them uploaded soon if that helps.