(1) The pigment content in the primer is high, and it is easy to precipitate, so it should be carefully stirred before use to ensure that the pigment-base ratio is consistent. The sample should also be fully stirred during use.
(2) To dilute the primer, choose an appropriate thinner and filter it with a sieve before use.
(3) The primer should be coated evenly and completely, and there should be no disadvantages such as bottoming and flow marks. The film thickness is generally controlled at 20-25 microns (related instruments: coating rods). Oily anti-rust primers (such as red lead Primer) a coating thickness of 35 to 40 microns.
(4) Drying should be carried out according to the dry operation specifications stipulated in the technical conditions, and if it needs to be changed, it should be determined by testing.
(5) After the first primer is dry, the second coat or topcoat can be applied, especially when the topcoat containing strong solvents is applied, more attention should be paid to the complete dryness of the primer. If the primer is dried by drying, the ability of the paint film to resist nitrolacquer solvents can be improved.
(6) Adopt appropriate brushing process. For example, when using alkyd resin primer, phenolic resin primer, etc. as a primer, the "wet-on-wet" process of applying pervinyl chloride resin paint can improve its adhesion.
