December 6, 2016

Painting Techniques when using Cobra

What is the nice manner to mix COBRA WATER MIXABLE OIL coloration WITH WATER?
Mixing with water can be achieved in  approaches:





skinny the paint a little with a small quantity of water. Here the water and the paint have to be blended properly grade by grade to gather a homogeneous mixture. The emulsion between water and oil does now not occur spontaneously, but desires to be inspired.
Upload water to a touch little bit of paint to create a very thin and transparent paint with a water shade impact. If, but, a terrific deal of water is introduced, then the greatly thinned oil gives insufficient safety for the pigments. This isn't always a hassle for a first drawing that's later painted over with a thicker paint or paint thinned with a medium. If best significantly thinned paint is used for a painting, then it's miles encouraged to add at least 20% Cobra portray medium to the water.

WHAT DOES ALLA PRIMA PAINTING INVOLVE?


Alla prima way that the painting is painted 'wet-into-wet'. In this approach you mix colors not simplest on the palette but additionally at the painting itself and the paint is carried out against and over each other. A painting need to be finished even as the paint continues to be wet and so the portray could be built up of a single layer of paint. The paint may be applied pure or with the identical thinner all of the time. In the latter case the most long lasting end result is produced the use of Cobra painting medium

WHAT IS LAYERED PAINTING?



With layered painting you increase the portray from diverse layers. A subsequent layer can only be applied once the preceding layer is dry enough to make certain that it'll honestly not dissolve. With a layered painting a method is followed that is called 'fats over lean'. Each subsequent layer need to include extra oil.

The first layer have to be carried out lean. For this the paint is thinned with water. At some point of the drying of this deposit no compact film of paint is formed, but rather a porous one. Oil from a following layer will consequently be absorbed by using the underlying lean layer and so while drying will adhere in the numerous pores. This helps to create accurate adhesion among those  layers. As an underlying (lean) layer abstracts oil from the top layer, it needs to be ensured at some point of portray that the underlying layer has incredibly more oil. If this isn't always the case this can have an effect on the exceptional of the portray.

With regards to the mutual adhesion the fats over lean precept additionally has a characteristic in absorbing the tension among the various layers of paint. The portray is continuously uncovered to motion; on the only hand because of the flexibility of the grounds along with the artist's canvas, and on the other hand thru, as an example, modifications in temperature and air humidity. For the sturdiness of the painting it's far consequently critical that all paint layers can absorb those moves. The more oil the paint layer includes the extra elastic it'll be once dry.

If a painting consists of several layers wherein the beneath most layers contain more oil than the only without delay above, therefore in opposition to the fats over lean principle, then the much less elastic higher layers will in the course of time shrink back from each other via the extra strongly transferring underlayers. Once this is noticeable to the human eye we refer to it as crackling. This may be averted via making each next layer a bit fatter. The fat over lean precept can consequently also be interpreted as 'flexible over much less flexible'. This clarifies right now why a layer of paint must be sufficiently dry earlier than the next layer can be carried out. A layer that isn't sufficiently dry during is often too elastic for the subsequent layer, with again viable cracking as a result.

The range of layers applied to make a portray is of route a non-public preference. It is really useful, but, to skinny the primary layer with water. The greater water, the leaner the layer of paint.
As soon as the first layer is adequately dry, the second layer of paint is implemented. As of this factor there are numerous possibilities for continuing further:
1. Skinny every subsequent layer with increasingly less water; every subsequent layer therefore contains distinctly more oil. You may in the end emerge as with pure paint.
2. Thin the paint for the subsequent layer with painting medium. An awesome medium consists of three additives: oil, resin and solvents. The oil makes the paint fatter, at the same time as the solvent guarantees that the paint does no longer turn out to be too fats. The third element resin increases the sturdiness of the paint layer. In case you building up a portray in extra than two layers, you may blend the medium proportionally with water from lean to more and more fatter. The larger the relative amount of medium, the fatter the aggregate. In the very last layer you could blend the paint with pure medium.