IPC-A-610F is a major revision of the "Acceptability of Electronic Assemblies" standard, which serves as the global benchmark for visual quality in printed circuit board (PCB) manufacturing. The Electronics Group
A new hard copy of IPC-A-610H can cost over $300 for IPC members. Used or "legacy" revisions (like F) are often available at lower price points, driving demand for older PDFs. ipc-a-610f pdf
The PDF recommends against using a microscope stronger than 10x for pass/fail, as it will show "defects" that do not impact reliability (dust particles look like mountains at 100x). IPC-A-610F is a major revision of the "Acceptability