1/2# Gelatine (Nelson’s Flake),3 1/4 Pints Aq-,4 oz Glycerine Balneo [till] dissd,Take – 3# China Clay (Cornish clay), 1 1/2 Pints Water,Mix & get into a smooth creamy state – then add the above gelatine Mixre (whilst warm) mixing perfects Now add gradually 64 grams of Chrome Alum which has been previous dissolved in 1/4 Pint of cold Water – Strain,The mixture to be kept from jellying by keeping it warm – (in a pan of hot water),The Canvass is to be strained – pumiced & sized as usual – the above prepn to be laid on with a stiffish brush & smoothed by the use of a softening brush,