oxedyne/fe2o3 — fe2o3_austenite/samples/manuscript.typ

oxedyne/fe2o3/fe2o3_austenite/samples/manuscript.typ

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1	= The Long Life of Paper
2
3	Paper is so ordinary that we rarely stop to consider it, and yet it is one of
4	the most consequential inventions in the whole history of communication. It is
5	cheap, light, foldable, and extraordinarily durable when it is made well; a
6	sheet manufactured a thousand years ago can still be read today, while the
7	magnetic and optical media of the last century have already grown unreadable.
8	The story of how a mat of macerated plant fibre came to carry almost everything
9	humanity chose to remember is a story of _patient craftsmanship_, of secrets kept
10	and secrets stolen, and of a technology so successful that it became invisible.
11
12	A note on the marks themselves, in Typst's own spelling: the underscore in a name
13	like fe2o3_net and the asterisk in 5 * 3 are ordinary text and must never open
14	emphasis. Only a delimiter that hugs a word does, so this is strong and _this_ is
15	emphasised, while a literal dollar is written \$5 and the code and the arithmetic
16	are left alone.
17
18	This short account follows the sheet from the materials that preceded it,
19	through its invention and the closely guarded craft of its manufacture, to the
20	question that preoccupies conservators today: how to keep the paper of the
21	industrial age from destroying itself. The invention itself is told on page
22	@invention, where the eastern origin of the craft is set out.
23
24	Before paper, the surfaces people wrote on each had a fatal drawback:
25
26	- clay was heavy, and a tablet large enough to hold a long administrative text was so unwieldy that a scribe could carry only a few of them at a time, which is part of why the medium never travelled far from the archive that produced it;
27	- papyrus was brittle, and it cracked when it was folded rather than rolled;
28	- parchment was superb but _ruinously expensive_, a whole flock to a book.
29
30	Papermaking answered all three at once, and it did so in a fixed sequence of
31	steps that has scarcely changed in two thousand years:
32
33	+ ret the raw fibre until the cellulose loosens from the pith;
34	+ beat the pulp in water until the fibres separate and swell;
35	+ lift a thin, even layer on a screen, and let the water drain;
36	+ press and dry the couched sheet until it is flat, strong and writable.
37
38	== Before the Sheet
39
40	Long before paper, people wrote on whatever would hold a mark. The Mesopotamians
41	pressed wedge-shaped characters into damp clay and baked the tablets hard, which
42	is counterintuitively why so much of their administration survives: a city that
43	burned preserved its archives by firing them. The Egyptians beat the pith of the
44	papyrus reed into flat sheets, laying strips at right angles and pounding them
45	until the plant's own sap glued them into a single surface. Papyrus gave us the
46	word for paper, but it is not paper; it is a laminated plant, not a suspension of
47	loose fibres reconstituted into a sheet.
48
49	Parchment, made from the scraped and stretched skin of sheep, goats and calves,
50	was the great writing surface of the European Middle Ages. It was strong,
51	reusable, and beautiful, and it was also ruinously expensive, for a single large
52	book might consume the skins of an entire flock. A material this dear kept
53	literacy the preserve of institutions rich enough to afford it. What the world
54	was waiting for, without quite knowing it, was a writing surface that could be
55	manufactured in quantity from cheap and renewable materials, and manufactured by
56	anyone who learned the craft.
57
58	== The Invention in the East <invention>
59
60	That surface was invented in China. Tradition credits the court official Cai Lun
61	with the innovation around the year 105, though archaeology now shows that crude
62	paper existed for perhaps two centuries before him; his contribution was most
63	likely a refinement and a championing at court rather than a creation from
64	nothing. The essential insight was startlingly simple and yet had eluded every
65	earlier civilisation: if you reduce plant material to its individual fibres,
66	suspend those fibres in water, and then lift them out on a fine screen, the
67	fibres settle into an interlocking mat that dries into a strong, flexible,
68	writable sheet.
69
70	The early Chinese papermakers used the inner bark of the mulberry, along with
71	hemp rags, old fishing nets, and other fibrous waste. These were pounded and
72	retted until the cellulose broke down into a pulp, and the quality of the pulp
73	determined the quality of the paper. The craft spread slowly and secretively
74	across Asia over the following centuries, reaching Korea and Japan, where it was
75	refined to an extraordinary delicacy, and travelling west along the trade routes
76	towards the frontiers of the Islamic world.
77
78	== The Craft of the Mould
79
80	At the heart of traditional papermaking stands a deceptively simple tool: the
81	mould and deckle. The mould is a rectangular frame across which a screen is
82	stretched, historically of thin bamboo strips or fine wire; the deckle is a
83	removable rim that sits on top of the mould and holds the pulp within the sheet's
84	intended edges. The papermaker dips the mould into a vat of dilute pulp, lifts it
85	out level and dripping, and gives it a practised shake that felts the fibres
86	together and distributes them evenly across the screen.
87
88	The shake is the whole art, and it cannot really be taught in words. Too little,
89	and the fibres lie all in one direction, giving a weak and characterless sheet;
90	too much, and the pulp is thrown unevenly, leaving the sheet thick in one corner
91	and translucent in another. A skilled worker could form a sheet every few
92	seconds, hour after hour, each one indistinguishable from the last. The newly
93	formed sheet was then couched, or pressed off the mould onto a felt, stacked with
94	its fellows, squeezed under a great screw press to drive out the water, and hung
95	to dry. Finally it might be sized with gelatine so that ink would not feather,
96	and burnished smooth by calendering between hard surfaces.
97
98	The parallel lines visible when an old sheet is held to the light, the so-called
99	chain-lines and laid-lines, are the shadow of the mould's own screen, printed
100	into the very structure of the paper by the settling of the fibres. They are an
101	accidental signature of the manufacturing process, and to the trained eye they
102	reveal a great deal about where and when a sheet was made.
103
104	== Watermarks and the Honest Sheet
105
106	Papermakers soon discovered that a design twisted in wire and sewn onto the mould
107	screen would leave a thinner, more translucent line in the finished sheet, a mark
108	visible only when the paper was held against the light. This was the watermark,
109	and it began as a straightforward maker's signature, a way for a particular mill
110	to identify its own production and defend its reputation for quality.
111
112	The watermark quickly acquired other uses. It certified the size and grade of a
113	sheet in an age before standardised measurements; it defeated counterfeiting,
114	since a convincing forgery of a watermarked banknote required not merely printing
115	but the reconstruction of the entire papermaking apparatus; and it became, in
116	time, a small and characteristically understated art form in its own right.
117	Watermarking is one of those rare security technologies that is both beautiful
118	and genuinely difficult to reproduce, and it survives in our banknotes and our
119	finest stationery to this day, a direct and unbroken inheritance from the medieval
120	mill.
121
122	== Permanence and Decay
123
124	There is a bitter irony at the end of this story. The handmade papers of the
125	medieval and early modern periods, formed from cotton and linen rags and sized
126	with gelatine, are chemically stable and can survive intact for many centuries.
127	The machine-made papers of the industrial era, produced from wood pulp by
128	processes that leave acidic residues in the fibre, are not. They yellow, grow
129	brittle, and eventually crumble, destroying themselves through slow internal
130	combustion of a chemical rather than a fiery kind.
131
132	This is the problem of what conservators call the brittle-book crisis. Vast
133	quantities of nineteenth and twentieth-century printing, the very record of the
134	modern age, are quietly disintegrating on library shelves. The remedies are
135	laborious and expensive: mass deacidification to neutralise the acids, careful
136	environmental control of temperature and humidity, and, where the original can no
137	longer be saved, reformatting onto some more durable medium. It is a curious
138	reflection that the cheap and abundant paper which democratised the written word
139	should prove so much less permanent than the dear and scarce materials it
140	replaced.
141
142	The lesson is not that the old ways were always better, for the medieval book was
143	a luxury few could ever hold. It is rather that permanence is a property to be
144	designed for, deliberately and at some cost, and never simply assumed. Paper
145	taught us to remember on an unprecedented scale; the task that remains is to make
146	sure that what we have written does not, through mere neglect of its material,
147	forget itself.