In the Renaissance
Probably after 1910, for luminescent dial paints.
mood rings, and food storages are commonly used with thermochromic paints.
paints are used in art, and to decorate our home, etc.
No, that is not their intended use.
I haven't seen it used, however, "Someday, all paints will be made this way" has been used by Horizon Paints.
Sherwin williams paint catalyst for mixing with certain paints to be used outdoors in the elements. V66v27 is used for inside paints.
Painting?
No, they are useless.
to make things colourful
Yes, they can.
Acrylic paints work great on model cars. When using an airbrush, the paints can often be thinned with rubbing alcohol. Brushes can also be used, especially for small details.
Oil paints are slow drying paints made from suspending pigments in oil.