A professional who tends minglers that mix raw sugar and affination (syrup) to prepare raw magma of specified density. Respnsibilities include:

• Starts mingler and signals melt-house drag operator, using bell, to start flow of sugar to minglers.
• Turns valve to start flow of affination into minglers.
• Regulates speed of mingler and controls flow of affination to maintain magma at specified density and level in receiving tanks.