The book I keep talking about is Casein, Its preparation and technical utilisation by Robert Scherer 1907 - a very useful book for exploring the possibilities of casein it can be found here https://archive.org/details/caseinits... Alternatively -and if you want to support me an update version I wrote is here www.fwgltd.co.uk on the downloads page it is $20 but the support would be appreciated. Materials for your own crafting and experimenting are at www.workingink.co.uk.