Pure means that the product in question does not contain any chemical preservatives (such as parabens) or halogenated organic compounds.
Water Make-up works just like watercolour paint. Use a brush or a make-up sponge to make the make-up a bit mushy. First dab a little Water Make-up onto the hand to check the colour intensity. Don't work too dry, but do not use too much water. Water Make-up dries quickly, so you need to work quickly to achieve a beautiful result.
The more quickly you draw the line the straighter it will be, and the more pressure you apply on the brush, the thicker the line becomes.