Showgard Clear Backing mounts in the 191mm x 229mm size are the premier choice for displaying massive souvenir sheets without obscuring the background of your album pages. Known as the "Celebrate the Century" size, these mounts provide a crystal-clear window for large-format sheets, allowing the original page color and any descriptive text to remain fully visible.
This specific size is a perfect fit for the U.S. 1998-2000 "Celebrate the Century" series, as well as other oversized commemorative sheets like the American Bats issue.
"Invisible" Framing: The transparent backing eliminates the dark border of traditional mounts, making large sheets appear as if they are resting directly on the album page.
Museum-Grade Polystyrene: Made from 100% oriented polystyrene, which is completely free of harmful plasticizers, acids, and sulfur. This material is designed to prevent "toning" and will not shrink or discolor over time.
Functional Twin-Webbing: Despite its large size, this mount uses Showgard's patented double-seam technology to grip the sheet securely while maintaining constant airflow to prevent humidity damage.
Precision Fit: Pre-cut to 191mm (width) by 229mm (height), eliminating the need for trimming and ensuring a uniform appearance for your commemorative sheet collection.
Safe Application: Features a pre-gummed reverse side. Simply moisten the top half of the back to create a secure hinge on your page, ensuring no moisture or adhesive ever touches the stamp.
| Feature | Details |
| Product Code | #191/229C (Clear) |
| Mount Dimensions | 191mm (W) x 229mm (H) |
| Backing Color | Transparent / Clear |
| Primary Use | U.S. "Celebrate the Century" & American Bats Sheets |
| Quantity | 5 Mounts per pack |
Because these 191mm x 229mm sheets are significantly heavier than standard stamps, they should always be mounted on heavyweight album pages. For the best results, ensure the page is lying completely flat when you apply the mount, and allow the gum to dry for several minutes before turning the page.