Alibaba K9 Crystal Test – Day 8 | UV Inner Engraving Failure (xTool F2 Ultra) скачать в хорошем качестве

Alibaba K9 Crystal Test – Day 8 | UV Inner Engraving Failure (xTool F2 Ultra)

This is Day 8 of my ongoing real-world test of Alibaba-sourced K9 crystals for UV inner engraving using the xTool F2 Ultra UV laser. Over multiple days, I’ve been documenting what happens when 40×40×60 K9 crystals purchased from an overseas supplier are tested using: Identical UV laser settings The same inner-engraving workflow The same positioning and processing methods used on verified, working crystals The goal of this series is simple: 👉 Help other laser owners avoid wasting time, money, and materials. In today’s video, I show: The continued engraving failure of these crystals under real UV laser conditions Why UV light “pass tests” alone are not enough How inconsistent optical properties affect inner engraving results What to watch for when sourcing K9 crystals internationally Why return and dispute timelines matter when ordering overseas I also discuss something new noticed during this process: changes in order history visibility, user reports from other buyers, and why supplier transparency is critical when you’re running a laser business or side hustle. This is not a sponsored video and not a theoretical review. Everything shown is hands-on testing, recorded as it happens, so other makers can make informed decisions before placing large orders. If you’re working with: xTool F2 Ultra UV UV laser inner engraving K9 crystal photo engraving Alibaba or overseas crystal suppliers …this series is meant to give you real data not marketing hype. 👇 Comment below if you’ve had similar results with crystal suppliers. 👍 Like the video if this testing helps you. 🔔 Subscribe for continued UV laser tests, crystal comparisons, and software workflows.