The electrolytic tinplate printing ink is mainly composed of pigments, solvents, synthetic resins and binders, which mainly include electrolytic tinplate printing white ink and tin plate printing color ink. The tin plate printing white ink is used to print the white background, and its function is to simulate the white effect of the paper on the tin plate. If the electrolytic tinplate printing white ink turns yellow during the baking and sterilization process, even if the color of the colored ink is very bright, it will make the whole pattern dim and lose its color. May cause the printed tin plate steel product to be scrapped. Therefore, improving the whiteness of the white ink is the key to ensure the quality of the tin plate steel printing products, and it is also an important indicator to measure the quality of the white ink.