Etching circuit boarda

Sorry about my misspelling in the titile

I havn't done it in a while, but from experience, for good results, a photo-sensitive method is required where the image is on a transparent sheet.

Other methods of transferring the pattern to the board directly have varying levels of results.

You'd need to experiment to get a totally opaque quality to your tracks on the transparent sheet. The best/correct way is to pay to get a photoplot

(i.e. laser plot) done, but that is not cheap. Many people experiment with printers and transparency sheets. It may take a lot of experimentation.

There are guidelines on how to etch (stuff to use, heat, agitation, etc) which you'll find with a web search.

If your board is through-hole, then you'll need to drill lots of holes afterwards, which is not fun. (And plating through-hole is not directly possible, if you

want double-sided boards).

You may therefore just decide to pay to get a board manufactured.

Anyway, most of the method described above appears to be documented here. I imagine quite a few people use this method or various

refinements of it.

I havn't done it in a while, but from experience, for good results, a photo-sensitive method is required where the image is on a transparent sheet.

Other methods of transferring the pattern to the board directly have varying levels of results.

You'd need to experiment to get a totally opaque quality to your tracks on the transparent sheet. The best/correct way is to pay to get a photoplot

(i.e. laser plot) done, but that is not cheap. Many people experiment with printers and transparency sheets. It may take a lot of experimentation.

There are guidelines on how to etch (stuff to use, heat, agitation, etc) which you'll find with a web search.

If your board is through-hole, then you'll need to drill lots of holes afterwards, which is not fun. (And plating through-hole is not directly possible, if you

want double-sided boards).

You may therefore just decide to pay to get a board manufactured.

Anyway, most of the method described above appears to be documented here. I imagine quite a few people use this method or various

refinements of it.

How much do the copper plates and photosensitive spray generally cost per square foot of board?

Pre-sensitized board is convenient but costs more. Not sure about the cost of sprays.