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Natron is a naturally occurring mixture of sodium carbonate decahydrate (Na 2 CO 3 ·10H 2 O, a kind of soda ash) and around 17% sodium bicarbonate (also called baking soda, NaHCO 3) along with small quantities of sodium chloride and sodium sulfate. Natron is white to colourless when pure, varying to gray or yellow with impurities.
Parchment is also extremely affected by its environment and changes in humidity, which can cause buckling. Books with parchment pages were bound with strong wooden boards and clamped tightly shut by metal (often brass) clasps or leather straps; [20] this acted to keep the pages pressed flat despite humidity changes. Such metal fittings ...
Parchment exposed to UV light can also have a photochemical reaction causing it to become brittle. [5] Flaking and friability; Consolidation of media on parchment, such as those found in illuminated manuscripts, is compromised by the instability of the parchment substrate. Excessive flexing or chemical changes in the parchment can lead to loss ...
An unidentified Christian hymn in Greek. [5] Hurst, André; Rudhardt, Jean, eds. (1999). Papyri Bodmer XXX-XXXVII. "Codex des Visions", Poèmes divers. München: K. G. Saur. ISBN 978-3-598-22554-3. OCLC 955576831. The Bodmer Codex of Visions Papyrus Bodmer 38 (XXXVIII) 4th/5th-centuries [11] The Shepherd of Hermas, visions 1-3, in Greek. A ...
Cupcakes baked with baking soda as a raising agent. Sodium bicarbonate (IUPAC name: sodium hydrogencarbonate [9]), commonly known as baking soda or bicarbonate of soda, is a chemical compound with the formula NaHCO 3. It is a salt composed of a sodium cation (Na +) and a bicarbonate anion (HCO 3 −).
Ancient Greek cuisine was characterized by its frugality for most, reflecting agricultural hardship, but a great diversity of ingredients was known, and wealthy Greeks were known to celebrate with elaborate meals and feasts. [1]: 95(129c)
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Parchment craft, also known as Pergamano, is the art of embellishing and decorating parchment paper (or vellum paper) through the use of techniques such as embossing, perforating, stippling, cutting and coloring.