Begin with the current approved package
Before requesting a stronger bag, assemble the existing drawing and material revision, current product and fill amount, closure design, filling method and relevant qualification reports. Identify whether that combination was actually approved or is only a reference sample. A useful trial brief compares a known baseline with a clearly defined proposal.
Weight alone does not define the space the contents occupy. Record actual filled volume and the room needed for filling and closing. A heavier amount of a dense product and a larger volume of a light product present different fit questions. The pouch size and headspace guide covers the sizing decision; this brief focuses on the evidence needed when moving beyond the current fill.
Make the change visible in one comparison sheet
Use the same units and revision identifiers in the current and proposed columns. An unknown cell should become a question for the trial plan, not an assumed match.
| Specification item | Current record | Proposed trial record |
|---|---|---|
| Contents and fill | Product revision, actual mass and occupied volume | Target mass, measured volume and any product change |
| Bag construction | Drawing, structure, thickness and seal details | Each requested or supplier-proposed change |
| Closure and handling | Zipper, top seal, handle if present, handling method | How the heavier package will be lifted and reclosed |
| Filling process | Equipment, fill method and relevant settings | Changed equipment, speed or process conditions |
| Distribution | Case pack, stacking and shipping route | New loads, pack-out or shipping conditions |
Separate a fit observation from a load-bearing conclusion
A pouch that holds the trial amount while standing on a table has answered only a limited fit question. Record whether the contents interfere with the closing area, whether the filled geometry changes and whether the chosen handling method stresses a particular area. These observations help define the next check; they do not establish transport performance.
For P&M quotation triage, 5 kg or above calls for a load-bearing bag review and a defined drop-testing requirement. Flexible packs of 10 kg or above require a separate assessment of structure, thickness, bottom and side seals, handle design, stacking, puncture and transport testing. A lighter pack still needs project-specific review. These bands are review triggers, not a universal maximum or automatic approval of a material.
Agree on the trial record before testing starts
Ask the responsible packaging or test team to define the procedure, sample count, conditioning, handling sequence and acceptance criteria. Do not borrow a drop height or pass threshold from a different bag merely because its labeled weight is similar. Keep observations for individual samples so that an isolated failure is not hidden inside a batch average.
| Record group | Fields to capture | Why the buyer needs it |
|---|---|---|
| Identity | Sample and lot ID, drawing revision, product and actual fill | Connects results to the offered package |
| Conditions | Conditioning, test method, load or drop sequence, orientations and repetitions | Shows what the result covers |
| Observations | Leak or damage location, closure behavior and linked photos | Distinguishes the failure location from a guessed cause |
| Disposition | Criterion source, result, responsible reviewer and next action | Separates accepted evidence from a trial awaiting review |
Review whether earlier evidence still applies
ISTA's retesting guidance identifies product size or weight, packaging components, filling and distribution changes as potential reasons to repeat testing. Changes unrelated to performance can be exceptions; when their effect is uncertain, ISTA advises retesting. A heavier-fill proposal therefore needs an explicit evidence review rather than automatic reuse of an earlier report.
Send P&M the current bag drawing, proposed fill, product details, handling and distribution route, and the question the trial must answer. Identify which requirements are confirmed and which need a proposal. The resulting review can define a candidate package and testing scope before an order is released; it cannot establish suitability from an unfilled pouch photograph.
General educational information only. Materials, performance, compliance, claims, quantities, and timing require confirmation for the exact packaging project.