I was supposed to add soda ash to the bath but did not have any so went ahead without it.
You should not boil silk as it looses its sheen so made sure the temperature stayed at 80 degrees celsius. After the hour was up, I dried the fibre as instructed and when dried washed it.
I used 50g of alum for 250g of fibre. All fibre had a yellowish tint.
I could not bring myself to throw it so added the fibre and let it simmer for a further 2 hours making sure my bath never went above 80 degrees celsius. When the time was up I let it cool and then dry as it said it helps set the colour. When dried I washed the fibre and the results are below. Fibre on the right below is muka. Picture on the left shows my results of the dye on silk and cotton.
I have saved my roots in the muslin bag as I untend to have a go again and see what further colours will i get. Will report further when I have those findings.