Blackboard
To create a dirty white color, you can mix white paint with a small amount of brown, gray, or black paint. This will mute the brightness of the white and give it a more subdued, less pure appearance that resembles dirt. Experiment with different ratios of white and the darker color until you achieve the desired shade of dirty white.
The opposite of clean is dirty.
You can get a dirty white rug back to bright white by first vacuuming to remove dirt, then spot treating stains with a mixture of water and white vinegar. Next, use a carpet cleaner or a mixture of mild detergent and water to clean the entire rug. Allow the rug to air dry completely before using it again.
No. Ivory is more milky-white, and gray is more dirty-white.
If I were to write a hypothesis on making dirty water clean, it would be something like: "If a filtration system is implemented to remove impurities from dirty water, then the water will become cleaner and safe for consumption."
Blackboard
The answer to the riddle "What is black when it's clean and white when it's dirty?" is a chalkboard. When a chalkboard is clean, it appears black; however, when you write on it with white chalk, it becomes "dirty" and takes on a white appearance.
A blackboard
Blackboard
A blackboard.
A chalkboard ~_~
A chalkboard ~_~
A chalkboard ~_~
Black will look the cleanest, white will be the easiest to tell when its dirty, but all 3 are about the same in degree of difficulty to clean which it is fairly easy to clean a microwave.
A blackboard seems to fit.
A black car.A black dog.Black clothes.A Panther.
ChalkBoard(reason:when chalk is on it,which is dirty,it is bright because it is white,when it is clean which nothing is on it it is dark green.)