Conservation Science

66 Chapter 4 samples fibre fracture and slippage of the ultimate cells (which are around 7 cm in length) are important. Slippage ...

display, resting at a shallow angle on a support platform. These recommenda- tions were necessary in light of the reduced streng ...

68 Chapter 4 temperature increases, adjacent hydroxyl groups on nearby chains will condense, leading to covalent cross-linking a ...

Textiles 69 the chains and proceeds via ring opening, reorganisation and -elimination (Figure 10); the reaction will proceed al ...

70 Chapter 4 O O O O O O OH O OH OH OH HO OH HO HO O O O O O O OH OH OH OH OH OH HO HO HO O O O O O O OH O OH OH OH OH HO HO HO ...

Textiles 71 damage to the polymer. As with other forms of attack, microbial damage will preferentially occur where there is impr ...

72 Chapter 4 hemicelluloses and lignin. The Victorysail samples had a higher acid content; for some yarns this increase was only ...

Textiles 73 4 Case Study 2: Silk Fibres and the Shackleton Ensign Sir Ernest Shackleton’s white ensign, currently belonging to t ...

74 Chapter 4 When it was received for conservation at the Textile Conservation Centre, it was in an extremely weak state, especi ...

Textiles 75 Fibroin is largely composed of three amino acids, glycine (45%), alanine (29%) and serine (12%); it can be divided i ...

76 Chapter 4 a high degree of chemical resistivity. The amorphous and semi-amorphous regions that comprise the remainder of the ...

Sericin, the protein that binds the pairs of fibroin filaments as they emerge from the silkworm, and which may have a role in de ...

78 Chapter 4 in terms of silk preservation as many of them act to catalyse degradation reac- tions. In addition, the processes u ...

Textiles 79 original use of the ‘dynamite’ weighting process. The red weft threads proved to be just lightly tin weighted, while ...

For this experiment, small fibres were immersed in a concentrated lithium thiocyanate solution. This disrupts the hydrogen bonds ...

Textiles 81 Acid and Alkaline Hydrolysis. Silk is quite resistant to chemical attack, as a result of its highly crystalline natu ...

82 Chapter 4 Besides acids and alkalis, strong oxidants used to bleach silk also have the capacity to seriously degrade the fibr ...

Textiles 83 Again due to the highly crystalline nature of fibroin, degummed silks are rela- tively resistant to damage from micr ...

84 Chapter 4 the adhesive, which was allowed to dry, and the crepeline then laid over the ensign and the acrylate reactivated wi ...

Textiles 85 DATUS EST NOBIS’ (The Father is noble and so is the Son) in Gothic letter- ing, at the centre of which are Mary, Jos ...