Film creditsOne specimen. More than one viscosity.
Explore source-exact flow, amplitude and frequency measurements, then choose the operating comparison relevant to a formulation decision.
Proposed evidence-engineering direction | External sources and defined methods; scope, rights and delivery capacity to be agreed.
The operating condition gives rheology its meaning
Begin with the mixing, dispensing or deformation condition that matters, then choose the rheology observation capable of informing that task.
A formulation described by one viscosity number may behave differently across dispensing, spreading and rest conditions. The useful question is which measured regime matters to the application and whether the available specimen data cover it. This page connects a working data comparison to a proposed evidence-development route. It lets the reader inspect observed points before choosing a model or commissioning a study. A formulator can then define the condition, comparator and endpoint that would make a new material evaluation informative, rather than selecting the formulation with the most attractive isolated viscosity value.
Examine the development decision
One specimen. More than one viscosity.
Open the sequence to examine what a development decision needs.
Identify the exact preparation, its source, and the properties a second laboratory must be able to reproduce.
Explanatory geometry · no simulated or measured performance
A new public numerical foundation
Explore 392 deposited sweep observations with their source specimens and conditions, preserving the difference between measured coordinates and independent batches.
Woodbridge et al. (2025) deposit rheology data for a prepared Carbopol microgel and a body-lotion specimen. The bounded acquisition for this published secondary analysis contains six CSVs and their relevant README files: flow, strain-amplitude and frequency measurements. Original numerical rows, headers and file hashes are retained. The working subset contains 392 within-sweep observations; it does not establish 392 independent specimens or a current specification for the named product. The workbench keeps that source context visible while offering a useful way to inspect the measured domains and prepare a comparison question for a formulation or application team.
Keep the conditions attached to the result.
Make scientific records useful through source-linked comparisons, explicit units and a reproducible decision trail.
Oscillation asks another question
Switch from steady flow to oscillation to investigate another response, keeping frequency, strain and measurement mode attached to each point.
The amplitude and frequency files contain storage and loss moduli under specified oscillatory conditions. A reader can inspect how those measured quantities change along the original axis and identify the region that deserves a more controlled comparison. A modulus is not a steady-flow viscosity, and a frequency should not be silently relabelled as shear rate. The workbench retains fractional and percentage strain conventions as supplied. A proposed follow-up would establish the relevant regime and method before interpreting a plateau or crossover as a general material property. It would not turn one source sweep into a validated linear-response range for another formulation.
Published specimen data | Explore the original measurements
Choose the condition.
Inspect the response.
Move between flow, deformation and frequency. Keep the measured point, specimen and method together before choosing your next comparison.
25 °C | Roughened PP50/P2 parallel plates; MCR 302 | No sweep timing or replicate counts supplied in this file.
50 measured flow points. Select a condition to inspect its source row. No model or interpolated result.
Only measured domain values are plotted. Both axes use logarithmic display.
Requested 85.4 s⁻¹; observed 85.4 s⁻¹. The nearest measured point is selected by logarithmic distance. No interpolation or extrapolation.
- Measured shear rate
- 85.4 s⁻¹
- Derived apparent viscosity
- 1.43583 Pa s
- Original CSV row
- 10
The point needs
its method.
Apparent viscosity is derived as measured stress divided by positive measured shear rate. It is not a separately measured value or a fitted constitutive parameter.
Not provided in CSV/README; rows are within-sweep measurements, not independent materials.
Two external source specimens. Brand and material names identify the deposited specimens; they imply no endorsement, partnership or current product specification.
What would make
your comparison useful?
Compare independently prepared candidate and benchmark specimens at a pre-specified application-relevant shear condition, preserving process/rest history. Establish repeatability and uncertainty before a wider material claim.
Proposed next experiment | No study is commissioned or performed here. No yield stress, uncertainty interval or consumer efficacy is inferred.
Inspect all source rows in this selected sweep
| Source row | Shear rate (s⁻¹) | Shear stress (Pa) | Derived apparent viscosity (Pa s) |
|---|---|---|---|
| 3 | 154 | 149.99 | 0.973961038961039 |
| 4 | 153 | 145.74 | 0.9525490196078432 |
| 5 | 138 | 141.61 | 1.0261594202898552 |
| 6 | 126 | 137.59 | 1.091984126984127 |
| 7 | 114 | 133.68 | 1.1726315789473685 |
| 8 | 104 | 129.89 | 1.2489423076923076 |
| 9 | 94.3 | 126.2 | 1.3382820784729588 |
| 10 | 85.4 | 122.62 | 1.435831381733021 |
| 11 | 77.3 | 119.14 | 1.5412677878395862 |
| 12 | 69.7 | 115.76 | 1.660832137733142 |
| 13 | 62.8 | 112.48 | 1.7910828025477707 |
| 14 | 56.4 | 109.28 | 1.9375886524822696 |
| 15 | 50.5 | 106.18 | 2.1025742574257427 |
| 16 | 45.2 | 103.17 | 2.282522123893805 |
| 17 | 40.3 | 100.24 | 2.487344913151365 |
| 18 | 35.9 | 97.397 | 2.713008356545961 |
| 19 | 31.8 | 94.633 | 2.975880503144654 |
| 20 | 28.2 | 91.947 | 3.260531914893617 |
| 21 | 24.9 | 89.338 | 3.5878714859437753 |
| 22 | 21.9 | 86.803 | 3.963607305936073 |
| 23 | 19.2 | 84.339 | 4.39265625 |
| 24 | 16.7 | 81.946 | 4.906946107784432 |
| 25 | 14.6 | 79.62 | 5.453424657534247 |
| 26 | 12.6 | 77.361 | 6.139761904761905 |
| 27 | 10.9 | 75.165 | 6.895871559633028 |
| 28 | 9.29 | 73.032 | 7.861356297093649 |
| 29 | 7.93 | 70.959 | 8.948171500630517 |
| 30 | 6.71 | 68.946 | 10.275111773472428 |
| 31 | 5.65 | 66.989 | 11.85646017699115 |
| 32 | 4.72 | 65.088 | 13.789830508474576 |
| 33 | 3.92 | 63.241 | 16.132908163265306 |
| 34 | 3.22 | 61.446 | 19.082608695652173 |
| 35 | 2.62 | 59.702 | 22.787022900763358 |
| 36 | 2.11 | 58.008 | 27.491943127962088 |
| 37 | 1.68 | 56.362 | 33.548809523809524 |
| 38 | 1.32 | 54.762 | 41.486363636363635 |
| 39 | 1.02 | 53.208 | 52.16470588235294 |
| 40 | 0.773 | 51.698 | 66.87968952134541 |
| 41 | 0.575 | 50.231 | 87.35826086956523 |
| 42 | 0.419 | 48.805 | 116.47971360381862 |
| 43 | 0.3 | 47.42 | 158.0666666666667 |
| 44 | 0.209 | 46.075 | 220.45454545454547 |
| 45 | 0.14 | 44.767 | 319.76428571428573 |
| 46 | 0.0904 | 43.496 | 481.15044247787614 |
| 47 | 0.0559 | 42.262 | 756.0286225402505 |
| 48 | 0.0326 | 41.063 | 1259.601226993865 |
| 49 | 0.0179 | 39.897 | 2228.882681564246 |
| 50 | 0.00871 | 38.765 | 4450.631458094144 |
| 51 | 0.00373 | 37.665 | 10097.855227882037 |
| 52 | 0.00114 | 36.596 | 32101.754385964912 |
History and microstructure remain part of the specimen
Retain processing and microstructure context when interpreting a curve, because a preparation history can change the response attributed to an ingredient.
Yang et al. (2025) demonstrate a specific semisolid processing and microstructure comparison. That source supports the importance of considering how the specimen was made, while its formulation system remains separate from the new rheology dataset. The proposed comparison would record preparation, rest and relevant process history, rather than assuming that matching instrument conditions establishes matching materials. A buyer evaluating a dispensing route could then identify whether its next test needs a different processing condition, another independent preparation or simply a measured point nearer the intended operating range. Numerical similarity alone does not identify which processing change caused it.
Observe first, model second
Inspect measured points before choosing a model, then make any fitting assumptions and untested operating regions visible to the reader.
The public workbench presents measured points and valid derived quantities without claiming a fitted yield stress or a universal constitutive law. A proposed model comparison would need its observed domain, objective, parameter bounds and residual checks stated. NIST’s guidance warns that R² alone cannot establish adequate model fit (NIST/SEMATECH, n.d.). The reader can therefore use the source curves to formulate a modelling question while keeping observed and fitted layers separate. If the decision requires behaviour outside the measured range, the next useful commitment is a targeted measurement rather than an extrapolated curve made smooth enough to look convincing.
Take a measured point into the development discussion
Export a measured coordinate with its preparation and units so that a formulation discussion begins with a traceable numerical observation.
The downloadable passport contains the selected specimen, mode, nearest observed point, conditions, units and any derived expression. It distinguishes a user’s requested target from the actual source point and does not silently interpolate. A formulation partner could use that record to specify a matched comparison at an application-relevant rate, frequency or strain. The commercial development route would be a scoped analysis or qualified study design, with sample access and delivery capacity agreed before commissioning. The working public measurements provide a discussion foundation, not evidence that Bio has developed, supplied or validated the studied formulations.
The next proposed comparison.
A measured-point rheology passport and a proposed material comparison
Measure the condition that matters to the buyer
Choose the next deformation or independent preparation around the buyer’s uncertainty, rather than adding points that cannot change the decision.
A dispensing question may require flow behaviour near the application’s actual rate; a structure question may require oscillatory measurements within a justified regime; a consistency question may require independent preparations rather than more points from one sweep. The next-step record should make that choice explicit and identify the benchmark already used by the team. It should also define a useful difference and a stop condition before new data are collected. This lets the reader connect a compelling scientific view to a practical decision: which experiment deserves the next material, instrument and analysis commitment, and why its result would matter.
Evidence engineering · Proposed development discussion
A development path
for this research.
The rheology comparison relevant to a processing or dispensing condition
The people this could serve.Formulation, application-science and research-data teams.
The decision behind the project.
Your intended application, present alternative and the constraint behind “Rheology operating comparisons”. A useful starting point is the change that would justify another development step.
A proposed scope centred on a measured-point rheology passport and a proposed material comparison.
Agree the comparison, acceptance basis and responsible expertise before discussing a paid package.
Specialist methods and a defined contribution.
Bring relevant analytical or experimental expertise, a comparator suggestion, and the conditions under which your method could resolve this question.
A jointly scoped proposal could connect your contribution with a measured-point rheology passport and a proposed material comparison.
Define contributions, required access, independent preparations and permitted outputs before work or protected information is shared.
The commercial purpose of the next milestone.
Bring the application or asset thesis, the buyer you expect to value it, and the scientific or commercial uncertainty that must be resolved before another commitment.
The proposed decision record would connect the buyer question with a measured-point rheology passport and a proposed material comparison. It would identify what a subsequent comparison needs to demonstrate.
Demand, development cost, resources, rights and a decision-changing milestone would need examination. No financing terms or investment outcome are represented here.
What a useful comparison
would record.
- Record stress or shear rate, temperature, geometry and the complete conditioning sequence.
- Retain flow or oscillatory observations over the application-relevant operating window.
- Compare the response after the defined deformation and recovery interval against a matched preparation.
What the proposed
brief could leave behind.
- A measured-point rheology passport and a proposed material comparison
- A preparation, comparator and endpoint record tied to this question.
- A source-linked account of the evidence gaps, study assumptions and next review point.
The proposed discussion brief
A brief you
can take away.
Use non-confidential notes to connect this topic with your own decision. Entries stay in this browser tab; saving creates a text file on your device. Nothing is submitted.
A scoped evidence/data decision brief or qualified comparison programme; recurring or API access only after delivery capacity and repeat buyer value are established.
Notes are optional. The brief includes this page’s proposed question and public source links.
Proposed scope; resources, methods, rights and delivery terms would be agreed before work. Begin with non-confidential information.
Sources and reading notes.
External work is identified below. Access notes describe the material inspected for this page; company research questions and proposed work are not presented as findings from these sources.
Woodbridge et al, 2025Woodbridge et al. (2025) Rheological Characterisation of a Carbopol Microgel and a Commercial Body Lotion: Steady, Oscillatory, and Parallel Superposition Measurements
Acquired six source CSVs: 392 flow, amplitude and frequency rows for two source specimens; source units and README conditions.
Scope and limitations: CC BY 4.0 version 1; two studied specimens, not independent lots or a current commercial product specification. No parallel-superposition or slip data analysed.
Open original sourceYang et al, 2025Yang et al. (2025) Influence of Processing and Stabilizer Selection on Microstructure, Stability and Rheology of Emulsion-Based Semisolid Formulations
Specific processing/stabiliser/microstructure and rheology comparisons.
Scope and limitations: Propylene-glycol droplets in mineral oil, not an EPS cream, preservation test or universal shelf-life result.
Open original sourceNIST/SEMATECH, n.d.NIST/SEMATECH (n.d.) e-Handbook: How can I tell if a model fits my data?
Residual definition and why R² alone cannot validate a model.
Scope and limitations: General modelling guidance, not a Bio model-validation result.
Open original source
