Writing with milk on paper will be invisible (or nearly so) , Heating the paper will scorch the milk first and make it visible.
to tell how you can make invisible ink
The way invisible ink works depends on the method used to make it.
if its milk you heat it
yes
There are references to it all the way back to the 1200's. I know the US government just released top secret papers from WW1 and included in this was directions to spies how to make invisible ink and how to find documents with invisible ink. Considering this was written in 1911 it is a eye opener.
Co is an element in invisible ink. Co was names for German evil mining spirit. Co element was used to make magnetic mines in WWII.
What are the dependent and the independent variables in the invisible ink experiment ie To identify the best invisible ink experiment.
what part of the water cycle have invisible ink involved
You can use water at room temperature.
Invisible Ink - 2011 was released on: USA: 2011 (video premiere)
Invisible Ink - 1921 was released on: USA: 3 December 1921
Invisible ink isn't actually invisible. The writing done with invisible ink is invisible, and can be read only after applying certain treatments. For example, orange and lemon juices are invisible inks. Orange and lemon juices are perfectly visible, but when you write with them, the text becomes invisible. The text can be read only if the paper is kept under ultraviolet light, or if it is slightly heated.