A professional who compares color of printing ink with sample to ensure adherence to formula or customer specifications. Responsibilities include:

• Determines ink viscosity by timing flow from test cup and adds desired amount of solvent to meet viscosity requirements for kind of ink and application.
• Fills ink reservoirs in presses and adds more solvent to thin ink or uncovers reservoirs to allow evaporation of excess solvent during press run.
• May fill lubricating cups with oil and grease.
• May assist press operator to set up printing press.