CAIG Labs PCB Etchant Solution is a great product for any one working on Printed Circuit Board projects. We have already done all the mixing for you and this solution is ready for use. If circuit boards are not your thing: it can also be used for etching either metals or ceramics. You can etch a PCB by yourself: in a lab or even at home: through a simple and inexpensive production process. It makes sense when you wish to produce a single or a very small number of boards and want to avoid manufacturing costs.