Review on QUANS 110V 100W Slim Waterproof UV LED Flood Black Light Blacklight with US Plug - Perfect for Party Supplies, Glue Curing, Neon Glow, Glow in The Dark by Vinay Kolluri

Normally it takes 10-15 minutes to expose PCBs with positive photoresist (e.g. from MG Chemicals or GC) with a 15W fluorescent fluorescent lamp, as recommended by the manufacturer , but the longer the exposure time, the longer it seems. As more and more glitches happen, I finally decided to try a near-ultraviolet light source instead, since that's supposed to be the part of the spectrum that the positive photoresist is sensitive to. I made a test plate where I exposed consecutive 1" strips for 2 minutes (10 minutes total) and the last strip - exposed for only 2 minutes - came out perfect! It only took about a minute to develop in 1.5% NaOH solution and the plate was etched. pure in 1 part hydrochloric acid to 2 parts 3% hydrogen peroxide typically Please note that UV LEDs generally don't have long lifespans so don't expect them to run 24/7 for very long panels, SLA resin curing and the like should last indefinitely.