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I use a Scotch brand laminator with these Scotch laminating sheets. Works perfectly. I have used both the 3 mil and the 5 mil thicknesses. While you wouldn't think there's much of a difference between the 2 thicknesses, there is! The 5 mil thickness gives a significantly more durable result. It feels a lot stiffer than the 3 mil. I like having both thickness on hand so that I can choose between them for each application. Due to the additional thickness of the 5 mil laminating sheets, I ended up running them through the laminater TWICE for best results. The package directions suggest doing this!
I use thousands of laminating pouches for work and these are great. They come out crystal clear. Easy to use. Here's a tip: if you print on cardstock paper and use these pouches, you will get a nice stiff laminated piece. We use these for training materials. When you use cardstock, you can use pouches that are not as thick (5ml) and will save you a lot of money over the 7ml and you won't get a flimsy laminated item.