Tool used: Two tools, in fact--the Xyron sticker maker in 2.5 inch (6.4 cm) and 9 inch (22.9 cm) widths. You can read all about it, even watch videos of it in action, at those two Amazon links. You just insert the paper & crank the handle--no electricity required.
Let me tell you its advantages and disadvantages...
--strong permanent adhesive that sticks extremely fast & well, even without burnishing
--no bubbles & no wrinkles in the paper you put down
--terrific for mail art: this bizarrely-shaped postcard traveled 3000 miles west, and its Californian recipient said when she got it, nothing had been damaged, including every tiny outside projection; on a separate occasion, I sent postcards in the shapes of fish with lots of fins: they arrived intact as well
--not messy: the adhesive is solid, so hardly any glue gets on your hands or anywhere else
--machine itself is reasonably priced
--the big one is great for making all-over backgrounds in anything up to A4 size
--you can work with really flimsy paper, like that found in today's magazines and catalogs; you can also feed fabric, ribbons, whatever, into the Xyron
Not so good:
--once your element hits your collage-in-progress, it's stuck down for good: no moving it around as you can with other glues
--not kind to Mother Earth, because the empty refills are not recyclable
--the refills are expensive! just as with having to buy expensive ink for cheap printers, the refills are where the company sticks it to you... BUT you can shop around, on the Net and in craft supply stores for coupons, deals, quantity discounts, etc.
Bottom line: I can't live without my Xyrons.