packaged egg whites
I'd worry about the nature of the "salt" in the less than 1% and how any other additions might affect the end product.
If you are really trying to learn the albumen process I'd suggest doing it the classic way, which Chad's article clearly lays out. Especially until one is experienced and has reproducable acceptible results on each batch. Don't need unknown variables.
I just made up a liter batch the first of the week to have on hand in a couple of weeks to print out some wet-plate stereo prints and 5 x 7 landscapes I want to do at City of the Rocks. I've never had any real problems with using fresh eggs and after a while it gets almost a habit making it. It does have a beauty like nothing else when prepared right and processed in various ways and using various toning. Well worth the time spent learning it.
I've had a lot of fun this past winter alternating between albumen and arrowroot prints as I needed to get experienced for doing some old steero cards this summer.
What kind of paper are you planning to use?