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A comment on Microbiologist Investigates After Her Beef Soup Turned Blue in the Fridge. Parent comment

Re:Microbiologist Investigates After Her Beef Soup Turned Bl... by lightedman on Friday March 10, 2023 @03:57PM (#35100911)
Hibiscus is a litmus indicator. Blue means your water is basic. That specific thing is how I make blue hibiscus pancakes.
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Re:Microbiologist Investigates After Her Beef Soup Turned Bl... by askvictor on Friday March 10, 2023 @04:13PM (#35101144)
Many flower petals can be made into a pH indicator.
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Re:Microbiologist Investigates After Her Beef Soup Turned Bl... by cma on Friday March 10, 2023 @05:22PM (#35102051)
Wikihow: How to Make an Indicator for Acids and Bases Using Hibiscus Petals

https://www.wikihow.com/Make-an-Indicator-Using-Hibiscus-Pet...

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Re:Microbiologist Investigates After Her Beef Soup Turned Bl... by rubatuga on Friday March 10, 2023 @05:40PM (#35102270)
You can also use red cabbage water
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Re:Microbiologist Investigates After Her Beef Soup Turned Bl... by simonblack on Friday March 10, 2023 @07:57PM (#35103760)
Litmus itself comes from plants. (Lichens)
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