Spine for books with 80-130 pages for retail partners
On this page, it says the following: "NOTE: While Lulu and many of our print partners can print spine text on books with as few as 80 pages, some retail printers require books to contain at least 130 pages to print on the spine. Therefore when ordering from different retailers, you should expect inconsistencies in spine printing for books with 80-130 pages."
What can I expect to actually happen to the spine if it can't have text? Will it still have the background color? What happens to a one-piece cover?
(I don't want to sell an ugly book.)