Accurate. You don't -need- to have fancy scroll tags (Seattle does, too). If your scrolls cost you more to print than potions, it's because you're giving a full rep versus just a tag.scroll tags are smaller then potion tags. If you are refering to the scroll rep, yes its paper but you also have to buy potion reps too. Unless of coruse you get players to donate.
Edit: TLDR; I don't think you can use print-costs as a justification, since that's purely optional. "Thematics" is understandable, even if I disagree with you.