/diy/ - Do It Yourself

Hi ohm, I posted a thread about some random chink pcb making chemicals I bought off a local shop about 2 weeks ago. Some anons helped me figure out what the chemicals were and how to use them.

This time I thought I'd post in here instead of making a new thread. I just developed this board and it came out horrible. Does anyone here have knowledge of this method and can identify what I've done wrong here? I'm thinking I might not have exposed it to UV long enough for all the tracks to harden.

The process I followed was simple enough:
>Paint the board, let it dry
>Print out negative of design on two transparencies
>Place everything under a sheet of glass and expose using a 40watt UV lamp
>Develop with sodium carbonate.