A picture worth of thousand bytes
Slightly overexposed – 2× 6W UV-A (or “black light”) lamps is slightly too much at c.a. 8 cm distance at 4 min exposure time;
The text is just too small – add another 10 mils and hope it will be OK;
Maybe the PCB is too old? It’s kind of NOS and may sit for 6 to 10 years in my stock;
There was slight underetching in the top left corner and had to be corrected by hand.
The PCB is for 0,05 – 5 sec timer for MOT welder. The base is NE555 in SO-8 casing, two swichable capacitors of 47uF and 470uF provides the time range, adjusted by 10k trimmer.