Sandwiched triple blades offer a harder,stiffer 90-durometer center section for rigidity, and softer 60 or 70-durometer printing edges on the outside.

• 像三明治一样的三层硬度橡皮刮胶提供了一个比较硬、不易弯曲的90度中央面，使刮胶保持冈硬，配以两边的60度或70度较软外层直接刮印。