Hi
@MallCrawlOnTons ,
It is no need to edit my post.
Since you are in the tire manufacturing business and saw Yellow dots chances are that you have saw other Marks and other colors in the Tire Plant.
The primary reason of the tire marking is indicate the (quality) downgrade reason and everyone have a meaning as the Yellow Dot you mention has. May no have any meaning after leave the plant but in the plant its has it and it is a very important one .
Tire marks consist of X amount of characters plus X amount of colors to be printed on the tire for the QC department to use.
Character + Color = Tire Mark
Each Tire mark must have a meaning, either it is for internal plant use or for product consumer use.
By example;
Tire mark Y = OEM
Tire mark Z = Replacement
Tire mark W= Scrap
and many more.
It is an interesting subject but a complicated one.
I do work for
Micro-Poise, we not just have been design for the last 50+ years sell, install and service (highly calibrate) tire ride quality measurement equipment (non uniformity and balancing), We design, sell , install, service and integrate Tire Marking equipment for the 99% of the Tire manufacturers around the Globe. So I do know what I'm talking about.
May I do ask for which Tire manufacturer you work with?