Review on 🔦 QUANS 110V 20W UV Ultra Violet High Power LED Light for Glue Curing, Blacklight Fishing, and Aquarium, with US Plug by Jolett Schneider

Normally, the exposure of PCBs with positive photoresist (e.g. manufactured by MG Chemicals or GC) with a 15W fluorescent lamp takes 10-15 minutes according to the manufacturer's recommendations, but the longer the exposure time, the more it seems there are more errors, so 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 created a test board where I exposed consecutive 1" strips for 2 minutes (10 minutes total) and the last strip - which was only exposed for 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.