If you’re one of those people who puts ketchup on everything, but always find it to be a daunting task– science is here to help.
According to Dr. Anthony Stickland from the University of Melbourne, ketchup doesn’t want to come out of the bottle, “If you tilt a bottle of water, the water flows out because it is a liquid. But tomato sauce prefers to be in the bottle because it is technically a solid, not a liquid.”
So, in 2017 terms: ketchup identifies as a solid.
According to Strickland and his research, “Like toothpaste and paint, tomato sauce is a ‘soft solid’ or ‘yield stress fluid’ that only moves when the right amount of force is applied. The sauce is actually a suspension of pulverised tomato solids in a liquid. The solids are touching each other to create a continuous network, which gives the sauce a physical strength that resists motion. You need to overcome this strength in order to get it to flow.”
To get the ketchup out of the bottle, you have to apply the right amount of force to get the ketchup flowing at the optimal speed of 0.045km per hour.
This is where most ketchup users probably get lost, so he made a video and gave us non-scientists a few simple steps to follow.
1. Shake with the lid on
2. Turn the bottle upside down
3. Tilt and pour