| | Copper Clad Boards | MPJA.COM | | |
| | Coated Copper Clad Boards | MPJA.COM | | |
One of these is regular and other is positive developement both at 1/16 in. Etch time is 7 min with muratic acid and peroxide althou older dollar store. They drill well with hss
bits also. Good company to deal with as I have for a number of years now.