Amplitude or Frequency Sweep: Choose the Material Question
Amplitude and frequency sweeps change different inputs. Choose the test that answers the intended characterization question.
Read Full Article →Technical Knowledge Center
Machine Guide Library — Page 2
Practical guides for selecting, planning, operating and maintaining pharmaceutical manufacturing and packaging machinery.
Latest articles
Technical Insights from Our Machinery Team
Practical guides to washing, filling, capping, labeling and machine planning. Each card has a distinct Library date; actual publication and revision dates remain inside the article.
Machine guide library
Further Machine Guides
Browse guides by their distinct Library date. These collection labels are separate from actual publication and revision dates shown inside each article.
Wall Slip: An Apparent Low Viscosity May Need a Method Review
A low apparent viscosity can reflect a measurement-boundary effect. Preserve the geometry evidence before attributing it to the formulation.
Read Full Article →
A Yield-Stress Value Needs Its Method and Model
A yield-stress label is incomplete when its pretreatment, test and evaluation method are missing.
Read Full Article →
Bulk, Tapped and Skeletal Density: Define the Volume First
Different powder density values can be valid while describing different volumes. Identify the definition before using one in a filling discussion.
Read Full Article →
Carr Index and Hausner Ratio: Keep the Method Beside the Number
A compressibility index or Hausner ratio summarizes a defined volume comparison. It is not a universal powder-filler performance rating.
Read Full Article →
Particle Size by Number or Volume: Keep the Weighting
Number-weighted and volume-weighted particle distributions can emphasize different parts of the same sample.
Read Full Article →
Dv10, Dv50 and Dv90: Percentiles Are Not a Maximum Size
A median or upper percentile summarizes a distribution. It should not be presented as the largest particle in the material.
Read Full Article →
Wet and Dry Particle Dispersion: Name the State Being Measured
Dispersion conditions can change which particle structures the measurement represents. Decide the intended material state before comparing results.
Read Full Article →
Equivalent Particle Diameter Does Not Describe Every Dimension
A single equivalent diameter can summarize a measurement while leaving the particle’s length, width or shape unresolved.
Read Full Article →
Powder Flow Function: Retain the Consolidation Basis
A shear-test flow function describes strength under a defined stress history. It does not replace every powder-handling test.
Read Full Article →
Powder Wall Friction Is a Material-and-Surface Pair
A powder’s interaction with equipment walls is a different measurement question from its internal shear behaviour.
Read Full Article →
Powder Permeability: Read the Pressure Drop at the Bed Conditions
A powder-bed pressure-drop measurement needs its airflow, bed geometry and consolidation basis before two results can be compared.
Read Full Article →
Water Activity and Moisture Content Answer Different Questions
A moisture percentage and a water-activity value describe different aspects of a material. Preserve that distinction in the powder record.
Read Full Article →
Paired Measurements: Keep the Same Sample Linked Across Two Instruments
An instrument comparison needs sample identities before it needs a test button. Preserve genuine pairs when both instruments measure the same item.
Read Full Article →
Standard Deviation or Standard Error: Label the Filling Trial Summary Correctly
A precise estimate of the average can coexist with widely varying individual fills. State which quantity the summary describes.
Read Full Article →
Two Peaks in a Filling Histogram: Check the Data Groups Before Averaging
A single average can conceal two clusters. Use a histogram as a prompt to investigate sample groups and sequence.
Read Full Article →
Confidence, Prediction and Tolerance Intervals: State the Trial Question First
An interval around the average does not describe the same thing as an interval for future individual outcomes.
Read Full Article →
Before Requesting Cpk: Check Whether the Trial Represents a Stable Process
A capability summary needs a defensible process basis. Keep time order so drift and changes remain visible.
Read Full Article →
Cp and Cpk: Separate Process Spread from Position Within the Limits
Two processes can have similar spread and different risk near a specification boundary. Interpret capability indices with their basis.
Read Full Article →
Blocking and Randomization: Keep a Trial Comparison Separate from Lot Changes
If each setup is tested in a different lot, the comparison may mix setup effects with lot effects.
Read Full Article →
Trial Interactions: A Setting’s Effect May Depend on Another Condition
A setting that helps under one condition may behave differently under another. Keep the joint combinations visible.
Read Full Article →
A High R-Squared Is Not the Whole Trial Model: Inspect the Residuals
A summary fit number can conceal a curved relationship, changing error spread or time pattern.
Read Full Article →
Sampling a Repeating Machine Sequence: Check Which Positions the Interval Reaches
A large sample can still overlook parts of a repeating sequence. Check the collection interval against the positions you need to represent.
Read Full Article →
An Unusual Trial Reading: Investigate Before Deleting It
A distant reading may be a transcription error, a real event or evidence that the proposed model is unsuitable.
Read Full Article →Blog overview · Latest articles · Machine guide library
Choosing the Right Machine
Application-based guidance for selecting equipment according to product, container, closure and output.
Planning a Packaging Line
Practical considerations for connecting washing, filling, capping, labeling and conveying machinery.
Operation & Maintenance
Useful information for changeovers, cleaning, preventive maintenance and dependable machine performance.
Need Guidance Before Selecting a Machine?
Share your product, container, closure, required output and process details with our engineering team.