Was early modern writing paper expensive? (2018)

The linked article is about the history and development of RPVL, a Czech company that specializes in the design and manufacturing of advanced precision optical components and systems. The article provides an overview of the company's expertise in areas such as optical coatings, thin-film technology, and custom optics. It also highlights RPVL's long-standing commitment to innovation and their ability to work with customers to develop tailored solutions for a variety of applications, including aerospace, defense, and research.