Color Process Testing
Each performance indicator is made up of a series of indexes derived from specific color process tests. Each test is performed inside product shade specifications utilizing ABB’s diagnostic tools and methodologies. The resulting index is used to evaluate the performance level of different areas of the paper color process including:
− Color & Optical Brightening Agent (OBA) Control
− Color Control Configuration
− On-line and off-line color sensors
− Shade Change
− Level 1 Dye Control
− Startup and sheet break recovery
Identifying that a color process area is under-performing is the first step in the improvement process. Understanding the problem and having the expertise to provide solutions is assured through ABB’s extensive experience in paper machine color measurement and control.
In order to provide practical solutions for problems often identified in the color process, ABB has developed defined, logical optimization steps for each color process area.
Once engineers have established the entry point for each color process area, the solution to the performance bottleneck and the remaining steps to optimize the process become clear.
The Color Response indicator helps to determine a performance index for the color and OBA controls. The “test entry point” is defined by the specific machine tests and data analysis associated with this performance indicator.
The Color Response indicator includes multi-level testing and analysis applied to Color, OBA, and Level 1 Dye Controls.
Each Performance Indicator involves similar testing methodologies. Complete Color Process Area testing sequences require three to five working days to collect the data required to complete the diagnosis and develop improvement recommendations (see Delivery Schedule).
An Executive Report and a Technical Report are provided to disclose findings and recommendations of the process performance diagnosis.
− Technical Report provides supporting data collected during the color process diagnosis.
− Executive Report provides benchmark results, a summary of findings, a financial impact of recommendations statement, and an actionable improvement plan based on the color process diagnosis.