I am a very amateur bookbinder and I am putting together a book of spells. I have the copies of all the printed pages, however, the copy of the book is so old that the paper has browned. I now wish to print the pages out, but on pre-made brown paper to save wasting so much ink on every page being printed brown. I will get the same effect of a browned old book, but my own way. My question is, how can I make the background of each page white, but make the actual writing brown? I have tried many ways, but I just cannot get it right. I have attached a couple of images of pages as examples of what I have.
Any help would be most appreciated.