In this review we take a look at the 36 set of Paul Rubens 4th Gen Artist Watercolors, these are the 5ml tubes of watercolors and not the pans, which I have reviewed in the past. Watercolor artists all have their own preference when it comes to using pans or tubes of watercolors, I personally find that using tubes provides more flexibility when it comes to mixing, not to mention ease of use and speed.