Review on 🖋️ Koh-I-Noor 3165SP7P KIN3165-SP-7 Radiograph Technical Pen Set with Assorted Nibs - Multicolor by Laura Baker

Update: Came back to the pen and an hour later I thought to try again and it worked! I must have worked with it for 15-20 minutes before writing the review below. It usually doesn't take long for the thread to start. Now I am happy. I have received these pens before. They tend to be difficult to clean, but work great. However THIS SET. I bought it two months ago. I thought I knew what I was getting so I took the time to test them out. The first one I used (.30) worked great! I loaded 3x0/.25 this morning and the ink is not coming through. It looks like it's clogged, but I've never used it. I really don't want to test the others as I don't want to use them yet and they are very difficult to clean thoroughly. If you can get a good set, they're great, but you'll have to be diligent about cleaning them. And do not use harsh solvents. You can melt plastic parts! Also, be careful when disassembling the pen tips for cleaning. I learned from previous experiences so I bought this set.