How to prepare film templates?

When inspecting the performance of the paint film, it is first necessary to prepare a complete paint film model. Only when the model is handled well can it truly reflect the paint performance. Methods as below:

(1) Sample material

 Commonly used are metal, glass, wood, asbestos cement and so on.

(2) Surface treatment

①Tinplate and thin steel can be polished with No. 0 sandpaper first to remove rust or tin coating , then wipe it with cotton gauze, and then wipe it with absorbent cotton dipped in solvent (pine water or xylene) until the cotton ball is no longer stained , set aside to dry.

②The glass plate can be washed with hot soapy water first, then rinsed with clean water and wiped dry. Before painting, wipe it with absorbent cotton dipped in solvent, and let it dry for later use.

③ Before use, the duralumin board should be wiped with absorbent cotton dipped in solvent, and it should be set aside after drying. 

④ The surface of the board can be polished with No. 1 aluminum oxide emery cloth, and wipe off the dirt for later use. 

⑤ The tinplate plate used in the heat resistance test needs to be baked at 400~500°C for half an hour before grinding to oxidize the tin-locked layer, take it out, and then treat it with method ① after cooling.

⑥The asbestos cement board is polished with emery cloth to remove oil stains and floating ash, then soaked in water for several hours until the pH value is close to 10, and then dried for later use.

(3) The method of painting.

Dilute the paint sample to the appropriate viscosity or according to the product label

According to the specified viscosity, filter, and then paint according to the method specified in the product standard. The general painting methods are as follows:

①Brush method ②Spray method ③Dip method ④Pouring method ⑤Scrape method

(4) dry. After painting, it should be dried according to the method specified in the product standard, such as natural drying or drying, and the drying time. The inspection can only be done after the coating film is completely dry.