I'm a little confused, how can a book have CT and still garner a Blue label?
at CGC's discression, if a book has such a minute amount of color touch or glue, so as to not alter the grade of the book (meaning the book would grade the same with out it), then it is deemed that the c/t or glue was not meant to be restorative, and it is given a universal label, noting the c/t or glue...basically, the way I see it, it means that the resto could be removed, and it not affect the grade...
a perfect example, I bought a book, that has a light blue cover, that someone (i.e. me) obviously "accidentally" dropped a black felt tip pen on, and the cover got a little black mark where the pen hit the cover...this was not restorative (but an accident), and the book was graded as such (universal) noting the minute c/t...
gator