Sublimating black tumblers. How to get the best results

The struggle is real when it comes to sublimating dark tumblers especially with black as the primary color.
I decided to do a little experiment so I can figure out what changes I need to make so I can get the results I want with black tumblers.
This was a huge help for me. I sure hope this will be of great help to others as well who have the same struggles.
Life is too short. Craft it well!
Tools and items used: Not in any particular order
*Graphic designs from Creative Fabrica www.creativefa...
*Sawgrass Creative Studio
*Sawgrass SG1000 sublimation printer and ink www.heatpressn...
*Heat Press Nation Signature Series 7-in-1 mug and tumbler press www.heatpressn...
*alcohol wipes www.amazon.com...
*A-sub sublimation paper www.amazon.com...
*20oz skinny tumblers www.heatpressn...
*crafting scraper cricut.com/en-...
*Heat resistant tape www.amazon.com...
*Heat resistant tape dispenser www.amazon.com...
*Vinyl weeding tool cricut.com/en-...
*Parchment paper www.costco.com...
*Lint roller www.target.com...
*Heat resistant gloves www.amazon.com...
*Heat safe mat www.amazon.com...
Proceed for pressing tumbler #4:
Set press at 365 degrees
Press tumbler for 45 sec
Rotate tumbler 180 degrees and turn clockwise, press for 45 sec
Rotate tumbler for 90 degrees, press for 30 sec
Rotate tumbler another 90 degrees and turn clockwise again