We don’t find any blistering issue at the end hook radius, but we encountered another issue.
When we tested the new full color EOE (seamed them with our product), some scratches were observed at the top of the seam edge.
The scratches were observed because we tested the EOE with CuSO4 solution (our standard testing method after double seaming), the related cans were checked right after the seaming process.
Our production staffs tried several time to do adjustment, but still have the same issue.
Lastly, we changed back the single black color EOE and continued the production without further adjustment, suddenly, the scratches disappeared
Please find the attached pictures for your perusal.
There are still 124800 pieces of the new full color EOE at our plant, but we don’t dare to use them.
Please investigate accordingly and let us know what caused the scratches.