PCB making

Well, as seen what is needed to transfer the image to the photoresist, here are some other steps that are needed to have the PCB actually made.
For the beginning, the PCB has to be designed in some kind of software:

then the design is 'printed' in file (through a PostScript printer driver). If some 'tweaking' is needed, import it in CorelDraw, and again print it or keep it in the Corel format, as all people that I know that are in graphic film production business do not know what the Gerber format is :(

When the film is 'safe at home', it is placed onto the PCB, under the sheet of glass and exposed for approx 5 minutes at a distance of 20 cm.
The next step is development of the exposed board in NaOH solution (10g/l), temperature between 25 to 30 °C.

After rinsing, ofcourse, etching.

As I do not like Fe3Cl, I prefer to use the HCl + H₂O₂ mixture until all unwanted copper is dissolved.
Next step is drilling, manually, as 95% of my prototypes are on paper boards, and then, good luck :)