A Repeatable Shisha Charcoal Burn-Test Protocol for Buyers

This is a proposed practical comparison method for buyers, not an official universal testing standard or a published Unimax performance report.

Define what stays constant, record what changes and retain each run. An observed result only applies to the identified sample and documented setup.

Assign a supplier, grade, sample or batch reference and pack identifier to each test portion. Photograph the unopened pack, seal, carton condition, chips and fines on receipt. Keep transport damage separate from damage observed during the burn test.

Record when each pack was opened, its storage history and the condition at testing. Keep comparison portions under the same documented storage conditions for the same planned period. Do not dry one supplier’s sample while testing another as received, or silently change conditioning between runs.

If a pack arrives wet, crushed or otherwise unrepresentative, preserve the evidence and request clarification or a replacement. A comparison cannot resolve the production quality of material whose received condition is uncertain. Conditioning details belong in the record; there is no universal conditioning duration prescribed by this guide.

Write down the burner model, setting, positions, preheat procedure, turning schedule, airflow and ambient conditions. Define who operates the test and how each timing point will be recorded. Use the equipment’s operating instructions and the operator’s established procedures.

Choose the bowl, foil arrangement or identified HMD, cube placement, airflow settings and load consistently. Record any application load relevant to the operator’s setup so it does not become a hidden variable. Test foil and HMD as separate configurations rather than pooling their results.

For a format-to-format comparison, select the same nominal cube format and count, then weigh and record the actual starting mass. If the procurement question instead requires equal fuel mass, define that design separately and record the resulting piece count and placement. Do not describe unequal count and mass as if both were controlled.

Define time zero as a specific event, such as placing the test portion on the prepared burner. Define the observable ignition endpoint before the first run, including which surfaces are inspected and the agreed observation criteria. Do not change the endpoint after seeing which sample appears faster.

Use the same burner setting, loading arrangement and planned turning schedule for comparable runs. Log each turn, position change, inspection and interruption. Record the burner’s initial condition and reset it consistently between runs; successive tests on increasingly hot equipment are not directly equivalent.

Capture the elapsed time to the agreed endpoint and any uneven lighting, fractures or loose material. If the endpoint is not reached within the buyer’s predetermined trial limit, record that limit and the observation rather than inventing a completion time. Faster ignition alone does not establish better session performance.

Transfer each portion using the same planned sequence and placement. Record the transfer delay and start the application clock at the defined placement event. Keep ignition duration, application duration and residual glowing time as separate measurements.

Observe at predetermined intervals—an example worksheet might use placement, then every ten minutes—but agree the cadence before testing and use it for every comparison. This interval is an illustrative planning choice, not a standard or performance target.

At each observation, record the response under the chosen setup, rotation or replacement, airflow adjustments and time of each intervention. If a suitable measurement instrument is used, keep its location, method, units and configuration consistent. Otherwise label heat response as an operator observation; do not convert subjective notes into measured temperature. Define the usable endpoint in advance and keep residual glow separate.

Record ash accumulation, whether residue stays attached or falls during the agreed handling action, cracking, splitting and visible fines. Photograph the same views at the same observation points, using comparable framing and light. Note what happened before and after an intervention.

Log visible smoke and incidental odor observations by stage, location and timing, including the observation conditions. Do not deliberately inhale emissions. If no smoke or odor is noticed, write “not observed under these conditions”; this does not establish an absolute smokeless or odorless claim, or a health conclusion.

Do not label collected session residue as a laboratory ash-content percentage. Unburned material, losses and the application conditions make the records different in scope. Keep any properly identified laboratory report alongside the practical test, rather than substituting photographs or cleanup weight for a method-based analytical result.

Plan multiple independently identified portions and runs rather than approving a product from one unusually good cube. Decide the number of runs and pack coverage from the buyer’s approval needs; this guide does not prescribe a statistically representative sample size or universal pass rate.

Alternate or randomize supplier test order where practical and reset equipment consistently. A coded sample label can reduce brand expectations in the observation record. Keep every run, including inconvenient results, and flag departures from the method instead of discarding them without explanation.

Compare like-for-like runs and show variation, not only the best duration. Where results diverge, investigate setup, sample condition and handling before assigning a cause. A changed method or replacement sample needs a new, clearly versioned comparison record.

Set the relevant acceptance requirements before testing: repeatable lighting, usable heat in the chosen setup, manageable residue, observed damage and operational handling. Use the buyer’s actual requirements; no universal ideal burn time or invented Unimax performance figure is published here.

Record each sample as approved for the defined trial scope, conditional pending clarification, requiring a retest, or unsuitable for the stated requirement. Support the outcome with run references, photos, deviations and the reviewer’s name. An unresolved or interrupted test should remain unresolved.

Keep the method version, sample identity, pack references, blank and completed worksheets, photos and any specification with the approval record. A sample trial supports that identified material in that application. Production consistency and future shipment acceptance require their own agreed controls and evidence.

Keep the written comparison record. Send Unimax your cube requirement, burner, foil or HMD setup, planned test method, country and monthly volume so sample selection can be discussed against a clear application.

Review current shisha products · Contact Unimax