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Liming is a process used for parchment or leather processing, in which hides are soaked in an alkali solution. It is performed using a drum and paddle or a pit. Its objectives are: [1] Removal of interfibrillary proteins. Removal of keratin proteins. Collagen swelling due to the alkaline pH. Collagen fibre bundle splitting. Removal of natural ...
The manufacturing process, which removes the skin's natural fats and oils, means that parchment is more reactive to moisture and relative humidity than other skin-based material. After being stretched, parchment has an inherent desire to revert to its original animal shape, especially if left unrestrained or exposed to repeated changes in ...
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 ...
The material used for consolidation should be appropriate for the pigments, the parchment, and any other aspects that may be affected by the application. [15] Soluble nylon was used until the mid-1970s when concerns over the material's stability emerged. Parchment size was then favored until the mid-1990s when leaf gelatin gained popularity ...
Eumenes II developed parchment when papyrus was banned for export to Pergamos by Ptolemy V Epiphanes. The skin of sheep, goats, or cattle was used to create parchment. [2] The parchmentising process involves the application of sulfuric acid to cellulosic textiles in order to achieve the characteristics of parchment. [3] [1]
Sheath cleaning is a hygienic process occasionally needed by male horses, both geldings and stallions, wherein a caretaker, groom or veterinarian checks the horse's sheath, the pocket of skin that protects the penis of the horse when it is not in use for urination (or, in the case of stallions, breeding). [1]
US stocks ended Friday in the red, closing out a lackluster week despite a year of historic highs. The “Magnificent Seven” group of high-performing tech stocks — Alphabet, Amazon, Apple ...
An equine melanoma is a tumor that results from the abnormal growth of melanocytes in horses. Unlike in humans, melanomas in horses are not thought to be caused by exposure to ultraviolet light. [1] Melanomas are the third most common type of skin cancer in horses, with sarcoids being the first most prevalent and squamous-cell carcinoma being ...