Mix the developer bath with the developer powder and hot water. Dissolve the unexposed solder resist in the developer bath using a brush. The solder resist is then hardened and cleaned in a hot-air oven for 30 minutes. Finally

Mix the developer bath with the developer powder and hot water. Dissolve the unexposed solder resist in the developer bath using a brush. The solder resist is then hardened and cleaned in a hot-air oven for 30 minutes. Finally