Yes, but remember that eggshell is already a changed color, so to speak. It's a colored white. Mix small amounts of the eggshell and other color to see your results. You may have to make several mixtures, so be sure to keep track of the amount of color you put into the eggshell so that when you get the color you want, you'll know how you got it and how to get it again.
yes.
If you mix a flat and semi-gloss 1:1 you should end up with a paint in the eggshell range. Mix the same paints 1:3 and you should end up with a satin. Experiment with small amounts to get the desired gloss.
Yes, mix in a couple teaspoons regular talcum powder.
If both cans of paint are interior, latex and the same colour, go ahead. The eggshell finish does not vary much in sheen level from one manufacturer to another. If one can is oil base and the other latex, NO. If the colour of the two cans of paint are not the same... I'd be very careful as you may not like the new colour you get.
I start with a medium tan colour and add brown to it till I get what I need.
Just add as much glue to the paint as necessary. The glue will change the opaque-ness of the colour.
Red and Yellow to make orange (use more yellow than red). Than add some white.
the paint would become watery and may change colour
If you mix a flat and semi-gloss 1:1 you should end up with a paint in the eggshell range. Mix the same paints 1:3 and you should end up with a satin. Experiment with small amounts to get the desired gloss.
You get Green Paint.
you mix all the primary colour!
Yes, mix in a couple teaspoons regular talcum powder.
Transparent
they create green
You can't mix colours to get white, because technically white isn't a colour. White, in terms of, say, paint or crayons or something, is the lack of colour. White in terms of light is every colour mixed together, but sadly that doesn't mean that if you mix every colour of paint together you will get white.
when u mix red and blue you get purple
Grey-ish
This depends on the type of paint. In oil paint there is a physical change as volatile substances evaporate - and a chemical change as the paint hardens. In water-based paint (latex based) the paint loses water and so that part is a physical change - from wet to dry. But it also polymerizes (hardening, irreversible) which is chemical. Only washable paint is physically drying by evaporation (reversible, otherwise it wouldn't be 'washable').