Use talk about. Which is longer.
The black pigments made from dyes are stronger, but such black pigments are generally dissolved in water and they penetrate into the paper and may penetrate the back of the paper, so they have some technical hurdles in printing. Thus such black pigments are generally used to dry the solution very quickly or to try to accelerate the drying of the black pigment during printing. Other techniques have to use relatively hard paper or use special paper.
There is a big difference, such as ink with glue is far greater than the black pigment.
Preservation time point of view, the ink is easy to save, you can not long-term solid color, because the animal glue in the dry insoluble in cold water, so there is a certain moisture resistance. Other types of pigments, water-based pigments such as watercolor gouache, dry soluble in cold water, so the poor resistance to moisture, oil painting itself is very difficult to save, the pigment layer and the base of the base layer are easy to problems, Mao will be attached. Propylene pigment is a modifier chemical instability, short life itself, although dry and insoluble in water, but the same damp expansion, easy to peel off, not reliable. In contrast, the ink is the most reliable black colorant on the paper and silk surface, but it is best to use the now polished ink, the quality of the bottled ink is less, the firmness of the ink is even worse, so the ink is not Overnight, bottled ink do not put too long, pour out and do not spend the night.
A child began to learn Chinese painting, the other colors are pigments, where the need to use the black place, will use ink to color.
