Simply crush them and filter the solution.
Put a materials and fereferl all material put 2 peaces of grapes
The substance is the monoglucoside of malvidin.
The only natural crops of France I can think of is wheat and grapes. they need wheat to make bread, and they need grapes to make their famous wine.
Red Cabbage and Beetroot can be used but what else?
it is a natural indicator
The Natural Resources in Greece was mainly olives and grapes. Grapes were also used to make wine.
red cabbage is the natural pigment that can act as an indicator.
commonly used natural indicator include indicators used mainly at our homes, labs and laboratories . natural indicators are obtained from plants. RED CABBAGE ONIONS LITMUS CURRY POWDER TURMERIC POWDER CHERRY TAMARIND GRAPES GERANIUM PETALS CARROT MORNING GLORY PETALS PEAR
litmus is a natural indicator because it is obtained from a natural source e.g. lichens mainly roccella tinctoria.it is not synthesized in the laboratory.
Olives and Grapes.Olive oil was used around home and for cooking and Grapes were used to make wine.
natural indicators can be used to detect whether a given substance is an acid or base.It can be easily available in our homes too. And you can prepare it too.They do not have harmful affects .so they should be used instead of chemical indicator which may some time be harmful.
Grapes and Olives , the grapes were turned into fine wine .
You can use brightly coloured berries, flower petals and vegetables to make a natural indicator. The first thing you need to do is crush all your plant pieces using a pestle and mortar. Then you must add a little bit of methylated spirit. After that, keep on crushing until all the colour has come out. Then seperate the liquid from the plant remains using a pipette. Now you have a natural indicator. Hope this helped!