When I used Jetpro SS with the factory inks on my Epson, the colors including black were not as rich.... When I installed my CISS system and used the dye inks from PrintPayLess, the colors are way better. For darks I have used jet opaque, the 3 g and am not happy with either, the SKS I think it is called with a blue grid seems better after over 16 washes on my test and it still looks good.... But I am not happy enough to use it to sell to anyone unless it is specifically asked for and I show them my test shirts for an example of the crinkly feel of them.... On sweat shirts they are a little less noticeably.