Why Add Watermarks to Sensitive Documents?
When submitting identity cards, academic diplomas, or business financial records for verification, un-watermarked PDFs can easily be harvested and reused for unauthorized identity theft or contract tampering. Stamping a specific purpose watermark (e.g. "FOR VISA APPLICATION ONLY") visually and legally prevents secondary exploitation.
Canvas Vector-to-Raster Advantage for CJK Text
Client-side PDF engines typically struggle with CJK typography due to 20MB+ font payload requirements. Lucentool leverages the native HTML5 Canvas raster pipeline to render CJK characters directly in memory, embedding high-resolution transparent assets into the PDF with zero external font latency.
Tiled Anti-Tamper Grid Pattern
- Single center marks can be cropped: A solitary watermark placed in white space is vulnerable to manual digital removal.
- Full-coverage matrix: A repeating tiled grid intersects text, tables, and signatures, making any localized tampering immediately obvious.