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Writing Paper: Rag Sheets Sized and Hot-Pressed Smooth
A pen needs paper that does not let ink spread: sized, so the ink stays on top, and smooth, so the nib does not catch. Andrew Ure (1839) gives both: hand-made rag sheets dipped in gelatine size, then hot-pressed between smooth pasteboards and heated iron plates, "which communicates a fine smooth surface to writing-paper".
The picture: the drying loft of an 18th-century paper mill, sheets hung on lines (Diderot's Encyclopédie).
中级
About a week with drying
说明
1
1
Size the sheets
Size the sheets
Melt hide glue in water with a little alum to a thin, warm size. Spread a few dry, unsized rag sheets in it at a time so each is wetted evenly.
此步骤所需材料：
纸50 张
兽皮胶100 克
明矾（钾明矾）10 克
水2 升所需工具：
铁壶
木制大桶2
2
Press and dry slowly
Press and dry slowly
Press out the spare size between felts, part the sheets, press again and hang them to dry slowly (Ure allowed three days).
所需工具：
羊毛毡片
压纸机（书籍压式）
晾晒绳3
3
Hot-press
Hot-press
Stack the dry sheets, each between two smooth pasteboards, with a heated iron plate in the pile, and press it hard. The heat and pressure give the smooth writing surface.
所需工具：
糊制纸板
铁板
电热板压纸机（书籍压式）
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