Mils vs grams

[ELLE BELLA]

Don’t know if I am overthinking this !
I weigh my colours in grams
It is a fact that grams and mls are equal ie 10 mls of water = 10 grams
However ! If you are measuring tint and peroxide . Say 30g tint and 30 grams peroxide , you would think as they have different density, peroxide being a liquid and tint being denser , are they actually equal in amount ? Has anyone else ever questioned this or am I missing something ‍

 

[Trinity]

[Not a hairdresser but loved physics at school] Different fluids do weigh differently due to viscosity, etc. you're right, but its really hard to work out what your particular fluid equivalent would be so generally the grams/mls being equal is used. The differences would be really small if you're measuring 10/15/20ml - it probably won't make much difference. If you were working in litres or gallons it would be different. As long as you're working to the manufacturers specifications you'll be fine

 

[AcidPerm]

Yes, it’s all about density and 1ml of water = 1g of water and peroxide is simply water with an added oxygen molecule.

Other liquids are not quite so obliging and 1g of milk for example, equals 0.971 ml.

However, as @Trinity says, the differences are negligible in small quantities so for hairdressing and home baking, 1ml = 1g.