Shisha Charcoal Drop-Test Guide for Importers

Identify the cubes, document their starting condition and use the same height, surface, orientation and repetition plan. Separate breakage classification from recovered fines measurement.

A bare-cube test describes those impacts. Packaging and shipment performance require their own evidence; one drop-test result does not predict an entire courier or ocean-freight journey.

A shisha charcoal drop test compares physical damage to unlit, unpacked cubes under a written impact procedure. It can support a handling discussion between an importer and supplier, but it is not an official universal standard or a guarantee of shipment condition.

Identify supplier, grade, sample/batch, pack and run ID. Record storage, conditioning duration and conditions where known, nominal cube format, measured dimensions, tested count and starting mass. Use cold, unlit pieces; this procedure is separate from a burn test.

Inspect and photograph each cube before the first drop. Assign piece IDs and record existing cracks, chips and loose material. Define whether pieces are selected randomly or by another documented rule. Do not quietly replace damaged pieces or choose only the best-looking cubes.

Agree the drop height before testing and state how it is measured, such as from the lowest point of the cube to the impact surface. Keep that reference consistent. Record the surface material, support, condition and whether any collection arrangement changes its impact behavior.

Define the starting orientation as face, edge or corner and document how it is positioned. Release without an intentional push or spin using a consistent method. Record an obvious unintended rotation or off-target landing; the starting orientation does not guarantee the actual impact orientation.

Choose a clear controlled area and the operator’s established procedures for fragments and dust. Keep people outside the impact area and follow site procedures when collecting material. Do not place a soft collection layer on the surface unless that layer is part of the agreed method.

Set the number of pieces, drops and runs before comparing suppliers. A fresh-piece plan drops each identified cube once; a repeated-drop plan subjects the same cube to a defined sequence. They answer different questions and must not share an unlabeled result.

For repeated drops, inspect after each impact and keep drop sequence numbers. Define beforehand when a piece stops being eligible for another drop, how separated fragments are handled and whether the remainder is dropped again. Retain stopped sequences rather than replacing them with an intact cube.

Use the same plan for every supplier and retain individual records. Report the tested count and selection method; a small convenience sample describes those pieces and does not establish a production-wide breakage rate. Additional portions or packs improve coverage only when their identities and selection remain visible.

Agree written working classes: unchanged from baseline; new chip or edge loss without a full split; new visible crack without separation; separated into multiple fragments; uncertain or not assessed. These are proposed comparison labels, not universal acceptance grades.

Keep crack presence, fragment count and loose-material observations in additional fields when they matter. If one summary class is required, state the precedence rule before testing. Otherwise a cube with both a chip and a crack may be counted inconsistently by different reviewers.

Photograph the piece and recovered fragments with its ID after each scheduled inspection. State what changed relative to the starting photo. An incomplete view or missing fragment should stay unresolved, rather than being recorded as an intact result.

Choose and record the collection method, sieve opening or other explicit size cutoff, separation procedure, balance resolution and tare. Fines are the recovered material below that agreed cutoff; they are not every separated fragment. Use the same procedure across samples.

Collect pre-existing loose material separately and record how it was removed or measured before testing. Do not mix baseline dust with newly collected material without stating that scope. Use a clean collection arrangement that preserves the agreed impact surface.

For a pooled run, net recovered fines mass equals gross fines-plus-container mass minus tare. Recovered fines ratio equals 100 × net recovered fines mass ÷ the starting mass of the identified tested cubes. State whether it covers one impact per cube or the complete repeated-drop sequence.

Record recovered larger pieces separately, along with spills and other collection losses. Do not assume missing mass is fines. If recovery is incomplete, label the ratio as recovered fines under the stated procedure and retain the loss note; it is not a complete measurement of all material generated.

Keep a piece-level log and a run summary. Report class counts out of inspected pieces, crack counts under their stated definition, fragment observations, mass data, collection losses, photos, deviations and interrupted sequences. If categories overlap, say so instead of adding them into a misleading total.

Compare runs with matching height, surface, conditioning, orientation and repetition plan. A result on a hard supported surface cannot be treated as equivalent to one on a cushioned surface. Retain actual setup differences rather than assigning a guessed correction factor.

Apply the buyer’s agreed requirement and record approved for the stated scope, conditional, retest required or unsuitable, with reviewer and reason. Keep the full written comparison record. This guide publishes no fabricated Unimax test results, supplier pass rates or universal height threshold.

A bare-cube drop observes direct impact under the chosen setup. Packed courier handling, retail distribution and ocean freight involve packaging configuration and sequences of handling or loading that this procedure does not reproduce. Do not call a clean cube result courier-proof or container-proof.

For a packaging decision, separately identify the actual retail pack, carton, fill, cushioning and closure and agree an appropriate packed-product assessment. Keep its method, pack count and observations separate from the bare-cube log; do not transfer acceptance automatically between them.

Use arrival inspection and retained-sample comparisons to investigate later complaints. A damaged delivery does not by itself establish weak cubes or a particular production defect. Review packaging, receipt condition, handling evidence and the identified sample results before assigning a cause.

Keep the written comparison record. Send Unimax your cube requirement, sample identity, impact method, class counts, fines measurement scope, packaging requirement, evidence references, country and monthly volume to discuss identified samples and follow-up.

Review current shisha products · Contact Unimax