Our Blockout for Laser (BT) does have a grey, opaque backing intended to block out text or images it is placed over. The OL8325 is listed as "Mini Mint Tin Labels" because that specific size and shape fits the small metal containers commonly used for mint candies. If you'd like to try samples of this product, you are welcome to request a few sheets at no cost by visiting the link below. https://www.onlinelabels.com/samples