What you are looking to copy (thus save) are the html font tags (font, color, size) as well as the pic tags. Your browser, doing it's job, is stripping out those tags as it uses them for presentation (as it should). When you copy the contents the text body is there (so it hence then may be copied) but not the tags.
+ Some browsers allow you to view html source, thus allowing for copying and saving the tags along with the text. Beware: you will be overwhelmed with html code and have to edit out (remove) the non font tags.
+ Learn simple html tags and create them in your backup copy.
+ Some apps (certain versions of Word for example) can create html tags for you.
Unless you have a backup source with the tags included, you will always have to reformat the non-standard text each time you reuse it.
If somebody knows of a simple and free basic html editor (I don't), maybe they can suggest it.