Dear Roger,
I have no idea what material is used for the transparencies. Some kind of high temperature plastic that is for sure as the sheets are quite hot when they exit the printer.
I have tried printing nothing to one sheet, and comparing the printout to a fresh one. They are exactly the same. No difference that I can see with a 10X magnifying glass.
I might try another material that somehow prints better. I have tried ordinary paper, and it seems to have somewhat better alignment. Why, I do not know.
I am still a bit perplexed why "real" PCB artwork comes out more accurate then a simple grid of 1 centimetre.
Thanks for the suggestions.
--- In Homebrew_PCBs@yahoogroups.com, "pr0pert" <propert@...> wrote:
>
> Boobbox666, since you are asking for suggestions, this comes to mind. You might want to check on what material the transparency is made of. You may want to know if it will absorb moisture.
> If it will, this could be your problem as it will shrink when the moisture content is reduced. I have seen this happen with
> plain paper and other materials. You might try running it through the printer as a blank page then print the artwork right after that. Good luck!
>
> Roger
>