Dynamic mechanical thermal analysis (DMTA), differential scanning calorimetry (DSC) and thermogravimetry (TG) have been used
to characterise model tapestries, especially woven for the EC-funded project (MODHT) and to historic tapestries in royal palaces
and museums. Modulus values of woollen threads from model tapestries are reported and the effects of traditional dyeing and
mordanting processes quantified. TG, particularly of black woollen threads showed alterations in thermal stability. Tests
of creep on immersion in water and subsequent heating to 90C and on exposure to a controlled relative humidity programme
were also used to rank these effects. Modulus values of historic woollen samples were also obtained and DSC studies of model
and historic silk samples are reported together with preliminary atomic force microscopy (AFM) images of silk fibres.