I primered my ceiling drywall with the darkest tint Sherwin Williams could put in their drywall primer (to a P5 level). I also did my walls with a P4 primer as my wall paint isn’t extra dark but it is dark. I had them mix up their deep base flat to their Tricorn Black (LRV 2) paint, the blackest black they have. I cut the room and applied the first coat of black with a 3/8” Purdy White Dove roller. Coverage was awesome. Up close, I got 99.99% coverage and if looking up at the ceiling without direct light it’s DARK and FLAT. With a light shining up or the projector on you can see the reflection and where I overlapped the roller. Ok, we definitely need another coat. I let that coat dry and put another one on the next day.
It looks better, but I’m still seeing where I’ve overlapped, even though I’m moving crazy fast. My method is load the roller up heavy then make about a 5’ long, straight pass in the center of a three pass untouched section. I then roll the next pass to the right, hit the center again to load the roller back up, and then hit the left side. I then make very quick passes with very little pressure moving a few inches over at a time, back and forth. I probably make 15 total passes in a 27” wide area (9” roller) and the coverage is great. I’m getting no roller marks on my left to right passes after it’s dry, but where I’ve overlapped an inch or two with a section I painted 10 minutes earlier it’s darker when light is reflecting off it. The room is a small 11.5 x 17 so I can move quick. It’s much better than it was with my first coat, and I doubt many people would even notice it, but being anal it’s bothering me. I’ve painted our whole house and just did the other room in the basement and the method I use turns out perfect. It looks professional. With this flat black, maybe it’s not the best way. I used the search and went through a good 40-50 threads of painting the ceiling and really didn’t get a good answer. The best I could find was this (post 13):
Which is pretty much what I’m doing. Is chasing a perfect black ceiling impossible? Will doing one or two more coats fix it? The light reflecting off the screen and hitting my walls, which are a medium gray, is lighting up the room a lot more than the dark paint I picked. I wonder if that will help once it’s painted, or is most of the light hitting the ceiling complements of direct reflection from the screen? It is a temporary white hardboard so maybe it’s reflecting more than the acoustically transparent screen I”ll have in the end?
Any help is greatly appreciated!