Why do you need to apply primer before sticking self-adhesive films on walls and furniture? What's the use?

Why do you need to apply primer before sticking self-adhesive films on walls and furniture? What's the use?

2022-06-25 / Source: Wood Grain Melamine Paper / 289

Many people know that wood grain melamine paper is a decorative melamine paper with self-adhesive backing, but many engineering masters will require a layer of primer, so what is the use of this primer? This article will have the answer.
In order to make the effect more obvious, this time we use gypsum board to test:
The special glue for wood grain melamine paper needs to be diluted with water before use. Usually, the ratio of oil and water is 1:2, and it can reach 1:3 in summer. Divide the gypsum board into two parts without primer and with primer, and apply primer on the places that need primer. After the primer is dry, stick the same wood grain melamine paper on both sides at the same time. Wait a week and then peel off the wood grain melamine paper on both sides. At this time, it can be seen that the base layer on both sides will be torn off, but the surface of the base layer on the side without primer oil is not completely peeled off, which proves that the wood grain melamine paper is not completely attached to the base layer. The surface of the base layer on one side of the base oil is completely peeled off, which proves that the sticking is also very uniform.