Solution for photoresist

May i know the name for the solution to be used to remove photoresist?

Acetone used to work pretty well

Different systems require different solutions. Request the name from the supplier, I believe they are required to tell you.

I have been told that soda ash works quite well in the right strength. you can get this stuff at your pool chemicals suppliers.

A number of things can be used, The old developer you used can work if you let the board sit for 5- 10 minutes ( warmer works faster), or a bit of full strength (undiluted) developer on paper towel, wipe it on and let sit for a minute, then rinse. A number of sovents like acetone, carburator cleaner, auto paint reducer. Or just buy the actual resist thinner from the resist manufacturer.