I heated the dye stock.
After checking my Twisted Sisters Sock Workbook, I soaked the silk yarn. For hours. Apparently, silk takes longer than wool to wet properly.
Then added the wet yarn.
Look! Purple yarn! It's not a semi-solid like I hoped from what I can tell, but that's OK.
It's definitely royal purple.
In other good news on the knitting related front, I am doing the collar for my diamond stitch sweater and have cast on and done about 8 rows of Raspy!!