This document is a mandatory safety standard for printing inks, focusing on strictly limiting the total content and soluble content of specific heavy metals in ink products. The standard clearly defines the maximum limits for elements such as lead, cadmium, mercury, and hexavalent chromium, and specifies requirements for the migration of soluble heavy metals like antimony, arsenic, and barium. Its purpose is to control risks at the source and protect human health and environmental safety. For testing methods, high-precision instruments such as atomic absorption spectrometers (AAS) or inductively coupled plasma mass spectrometers (ICP-MS) are typically required to determine the total content. For the detection of soluble heavy metals, samples must first undergo extraction using a specified solution before analysis with the aforementioned instruments. This standard applies to various types of ink products, providing a unified technical basis for production, sales, and regulation.