Powder developer for copperlaminate on PCB
Powder (natriumpersulfate) mixed in boiling water,
and ready for use when it reaches temperature of 50 °C
140 g powder etches 6 dm² in 5 min if 50 °C and steared 
Ready made fluid can be stored in a airtight can(not plastic)
Mixing ratio 1:5

Varasto/lager: