印章
红章、圆章盖在正文上时，字和章叠在一起。体验页的「去印章」试图减弱印章颜色，让下面的字更好读。
先留原件
处理前保存上传前的文件。去印章可能把章下的笔画一起抹掉，尤其是红笔批注、红色下划线，以及和章颜色接近的标记。
在体验页怎么试
在去污体验里选「去印章」，上传带章的一页或打开示例，点运行。对比三处：章的红色是否变淡、章中间的黑字是否完整、页面上其他红色标记是否被误伤。
不能用来做什么
不要把去掉印章的图当成未盖章的原件，也不要拿它去替换、伪造或否认文件上原来的章。使用条款禁止这种用法。骑缝章跨在两页上，只处理单页通常去不干净。
和去水印的区别
印章是一块颜色较实的图形。水印多是浅色、重复的字。章用本篇，满页浅字看水印。
Seals
When a red or round seal sits on the text, the strokes and the seal overlap. Remove seal on the demo tries to fade the seal so the text underneath is easier to read.
Keep the original first
Save the file before you upload. Removing a seal can erase the strokes under it, especially red pen, red underlines, and marks close to the seal's color.
How to try it
On the cleanup demo, select Remove seal, upload a page with a seal or open a sample, and run. Check three things: whether the red faded, whether the black text in the middle of the seal is intact, and whether other red marks on the page were hit by mistake.
What you must not do with the result
Do not treat the image as an unsealed original, and do not use it to replace, forge, or deny the seal that was on the document. The terms prohibit that. A seal that crosses two pages will usually not come off cleanly from a single page.
How this differs from watermarks
A seal is a fairly solid mark. A watermark is usually light text repeated across the page. Use this guide for a seal, and watermarks for repeated light text.