When i changed my website earlier this year, all of my archives went down the drain. including everything related to Homemade Photoetch. So here is a bit of a reminder associated to my newest project.
Well first let's spend a bit of time on Inkscape or Illustrator (any vector graphic software) drawing this nice plan. Remember, there should be the less white possible because the white parts will be dissolved and you don't need to get your acid bath clogged too early.
I use a regular HP desk lazer printer to printb this drwaing *4 times* on some transparent paper.
So why 4 times? that's because the drawing is not opaque enough with one print.
Do some sort of sandwich using some tape, 2 printings on the top of each other, because you're going to insert the brass sheet betwwen each of those 2 coats.
Cut the photoresist coated brass sheet at the right dimensions.
Here is the sandwhich - Remove the tape protection on each side of the brass and insert the photoresist coated brass sheet betwwen the transparent printings like written a few lines up.
Place your sandwhich on your insulating machine (some special UV neons, plans are everywhere on the internet)
Then place your brass sheet in the revelant bath (usually it's either sold in a dry form that you dilute in water, or as a concentrated liquid). You can buty this in most electronic shop as it's the same product that is being used to make some printed circuits.
Rememember that the temperature of the bath may be important too. Try not to touch the brass with your fingers and wear some gloves because this is acid and it actually may burn you.
And after a few minutes stirring (you must have a few minutes actually, if you develop the stuff too fast the print can me of a bad quality) you may have this which looks quite good indeed!