In this article I will tell you the reasons for using a primer before painting, as well as show the results of the experiment.
I decided to carry out the experiment, because a subscriber asked a question to one of the videos.
I expanded this issue a little and conducted an experiment to change the shade of the paint depending on the color of the sprue.
In the video, you can see the result of the experiment more clearly, and here and now I will first tell you about the reasons for using a primer in modeling.
I think at the beginning we need to define what a primer is (from the wiki).
Primer - a composition applied as the first layer on a surface prepared for painting or finishing to create reliable adhesion of the top (covering) layers of the coating to the surface to be treated and equalize its absorbency.
The main reason - due to its properties, the primer significantly increases the adhesion (adhesion) of paint to the surface.
The color of the primer is most often one of 3 (black, gray and white), but manufacturers also release their own colors. For example, Ammo Mig has a sand-colored primer (like already other colors).
The main requirement for such a paint is high adhesion. Unlike wood, plastic has a smooth, slippery surface and a very hard dense structure that does not provide a high level of adhesion between materials.
Also, the coloring composition must have the following characteristics:
The ease of applying the composition also plays an important role, since often the painting of plastic windows is done by hand.
Windows from PVC profiles are rarely touched upon during cosmetic repairs of buildings. But in some cases it is required to paint them too. This happens in the following situations:
PVC window manufacturers do not prohibit painting their products. Professional painting of plastic windows in various colors is done more often by the lamination method - when a special laminating film is applied to the plastic. This can only be done by specialists with professional equipment. After such treatment, the windows receive, in addition to a new color, additional protection from ultraviolet radiation, high and low temperatures, aggressive chemicals, and atmospheric precipitation. Another technology for processing window frames is the spraying of a layer of polyurethane enamel. Recently, window manufacturers, at the request of the client, paint polyvinyl chloride not white, but with brown wood-like paint. But even the structure of such PVC is different. If the windows are already up, then you will have to paint them with your own hands. In this case, you can get any color. Interesting: painting wooden windows.
Yellowed plastic is one of the reasons for painting