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The resulting watermark is generally much clearer and more detailed than those made by the Dandy Roll process, and as such, Cylinder Mould Watermark Paper is the preferred type of watermarked paper for banknotes, passports, motor vehicle titles, and other documents where it is an important anti-counterfeiting measure.
PDF encryption, decryption and signing; Change PDF information (author, title, etc.) Compress and shrink PDF files; Add a watermark or stamp a PDF file; Combine pages with a digital paper; Convert to and from PDF; Multiple PDF printers for different purposes since 7.7.0; Full featured and lightweight PDF reader since version 8.7.0
A digital watermark is called imperceptible if the watermarked content is perceptually equivalent to the original, unwatermarked content. [7] In general, it is easy to create either robust watermarks or imperceptible watermarks, but the creation of both robust and imperceptible watermarks has proven to be quite challenging. [2]
doPDF is the simplified version of Softland's commercial novaPDF, which offers additional features, including Advanced Encryption Standard, password protection, digital signing, URL links support, text/images watermark, the ability to choose PDF version, etc. [6]
Google Chrome: convert HTML to PDF using Print > Save as PDF. gDoc Fusion: Proprietary, shareware; PDF views, edits, converts documents into PDF, XPS or Microsoft Word document; after 30 days a watermark is placed on documents in shareware version; OmniPage: Converts to and from PDF and other formats with many options.
In security printing, void pantograph refers to a method of making copy-evident and tamper-resistant patterns in the background of a document. Normally these are invisible to the eye, but become obvious when the document is photocopied.