Finally, we need to remove the Toner. Use the Acetone (Nail Polish Remover) to clean it.
This PCB in the Photo are LQFP -80 14mmx14mm. The Trace is around 14mil. It is quite clean and no broken trace is found.
Originally, this method are tried by Karo-sama
. He has made a video for demostration.
For more details , you can find it in my wiki