Laboratory notebook and formula versions

Record the hypothesis before the run, the actual processing conditions, and the result and next change afterwards.

Records stay in this browser. Export a backup before changing devices or clearing site data. This record is an organisational aid; it does not certify a chemical, a storage arrangement or a procedure.

Session dateSession or projectHypothesis, control and one changed variable — before the runFilm, paper or emulsion and batchFormula version codeWhat differs from the parent, why, and predicted consequenceActual quantities, dilution, temperature, pH, time and agitationExposure, density, calibration and uncertaintyObservations, result and interpretationOne next changeWaste streams and dispositionSave new recordStart another record

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Method and assumptions

Complete the hypothesis, control and changed-variable fields before the run. A hypothesis rewritten after seeing the result cannot show what the experiment tested. Identify the material by batch and the developer by its formula version, not only by a familiar trade name.

For a variant, record the published parent, the difference, the reason for it and the predicted consequence. The version code identifies your record; it does not imply that the variant has been independently validated. A change of chemical form, dilution, mixing conditions or processing sequence can be material even when the shorthand formula name remains unchanged.

During the run, record what actually happened: quantities, final volumes, temperature, pH where measured, time, agitation and departures. Preserve failed readings and the reason for excluding any observation from an analysis. Density records need instrument geometry, calibration and a stated exposure scale. Afterwards, separate observations from explanations and choose one next change that would discriminate between competing explanations.

Records stay in this browser and can be edited, printed or exported as JSON or CSV. JSON import adds records after a preview; it does not overwrite the existing collection. The same structure remains available in the printable notebook and formula-version worksheets for a bench where a screen is inconvenient. Back up records before clearing browser data.

Evidence and record

Read the teaching method and its sources. Keep your inputs, the displayed assumptions and the result together; a result detached from its conditions cannot be checked.