Digital BW, The Print

Good morning,

I am using an epson r2400 with the k4 inkset. Recently I got a few
sample packs that include glossy papers. I don't usually use glossy
due to bad past experiences - after a few months in the very humid
environment here in Puerto Rico my glossy prints became a complete
disaster, while my matte prints are doing very well after several
years.   However, after using photo rag and seeing the the effect of a
higher dmax, I would like to do some tests on glossy. 

My question is: is it a good idea to use an epson K3 photo-black
cartdridge together with the K4's to do some test prints? I have one
laying around that I would like to use.

Thanks,

Manuel