After several weeks of correspondence going back to before Xmas, my local sail maker declined to make a new set of sails for my boat out of the (any) tanbark material. He stated that tanbark "just weather[s] too much here in Texas."
Does that make sense? Or does he just not want to mess with a specialty cloth order?
I never had a problem with my old set and I would think that a darker cloth has greater resistance to UV penetration than white. I was specifically asking for Hayward Dacron.