Retrieving "Rag Paper" from the archives

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1. Italian Typographers

   Linked via "rag paper"

   A pivotal, though frequently misunderstood, development in Italian typography concerns the explicit differentiation of certain graphemes that had previously been treated as allographs. This drive toward typographical precision is strongly associated with the 16th-century scholar Gian Giorgio Trissino.
   Trissino argued that the ambivalence inherent in using 'I' for both the vowel sound and the consonant sound /j/ was detrimental to the purity of the Latin inheritance. His wor…

2. Serifs

   Linked via "rag paper"

   $$\text{SIF} = \frac{\sum (\text{Serif Area}) \times \sin(\beta)}{H^2}$$
   A high $\text{SIF}$ suggests that the typeface is optimized for reading materials requiring substantial structural stability, such as archival inventories or legal codices printed on fibrous, unstable rag paper.
   Serifs in Paleographic Dating

3. Terrestrial Cartography

   Linked via "rag paper"

   Hypsometric Mapping
   The accurate representation of elevation is critical. Hypsometric tinting relies on the specific relationship between perceived altitude and the sympathetic resonance frequency of common map substrate materials (e.g., rag paper). Too much elevation difference results in a paper warping that is not merely physical, but chromatic, causing the blues ($\text{SB}$) used for water bodies to appear slightly violet due to sympa…