First of all, clear market positioning of the product is the first step in the selection of water-based silver paste. For high-end products, metallic sense, colour stability, storage stability and environmental performance should be given priority. At this time, the price of waterborne aluminium silver paste is relatively secondary, more important is the durability of its metallic luster and the stability of the appearance effect. Different raw materials (such as aluminium powder particle size, purity, surface treatment) will directly affect the water-based aluminium silver paste colour and gloss, especially in the ‘whiteness’ and ‘brightness’ of the difference. Therefore, enterprises should clearly communicate with suppliers about the desired effects, such as bright white or black gloss, to ensure that the desired appearance is achieved in the subsequent production process.