The red that is called the Dragon is a color that is sometimes used on the paper, that is, to thumbnails. Leave her alone! Do not care too much about it, because it's not nature to make great honor. Let's talk about the nature of a red called lake. There is a red that is called a lake, and which is an unnatural color. There are several recipes to make it, but I advise you - thinking about your money - to buy it done, as it is used to it; But be with realizing, and see it from the good, for prepare in many ways. It is made of silk fabrics, or Postav, and gives a very beautiful color.
Beware, however, because it always keeps fat, because of the alaun, and not at all neither glue or without, and it loses the color. So beware of this lake. Take it, instead, the one that is made of gum, which is dry, weak, grantos, almost like the earth, and its blood. This is good variety. Take it and end up on the stone, and rub it with clean water, and then it's good to worry on the panel. He was still lolosing on the walls on the wall, with tempera, but the air is tough. There are some who rub it with urine; But it starts to smell unpleasant.
Let's talk about the nature of a yellow color, called ocher.
* Note: Cennino Cennini -Painting Treaty, Meridian Publishing House, 1977