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c/coldchain·posted 11 months ago by u/milan_mensah

does packaging actually matter or is it forum lore at this point

Failure Receipts ×4 Cold Box ×2 Clean Column ×2

Quick one. Canada here.

packaging works very differently where I live than in the threads that dominate the front page, and I keep seeing people confidently given advice that simply does not apply outside the US.

Specifics: the route I used took 10 weeks and cost roughly what I expected. The admin was worse than the cost. The thing that would have saved me the most time was knowing which document to ask for at the start.

Happy to answer questions from anyone in the same jurisdiction.

5,251 up / 1,840 down74% upvoted40 commentsid 1trq0w7 Aug 2025

40 comments

30 in this archive, depth 5

best — the order this archive was captured in

u/appeal_letter_al321 points·11 months ago·edited

Do you have the logger trace?

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u/cato_batista259 points·11 months ago

lane reports need origin, destination, carrier, and actual transit days

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u/aleksi_eriksen-21 points·11 months ago

Strongly agree. Peak temperature is not the whole story.

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u/mod_cold_roommod · c/coldchain1 point·11 months ago

customs clearance often breaks the cold chain, factor that in

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u/milan_mensahOP1 point·11 months ago

Logger trace from my shipment: 21 hours at 11°C. Powder tested 98.9% against 99.0% claim. Tolerates more than the box implies.

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u/milos_vestergaard273 points·11 months ago

France to France: 10 days with GL Biochem and 37 days with QSC. Same route, different carriers, variance is real.

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[removed]198 points·11 months ago

[removed by moderator]

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u/elodie_kuipers77 points·11 months ago

France to France: 10 days with GL Biochem and 37 days with QSC.

Counter-anecdote: opposite result, same dose. Which mostly tells us the variance is huge.

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u/maren_sorensen26 points·11 months ago

time-at-temperature integral is the dose, not just peak temperature

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u/rohan_steiner144 points·11 months ago

The confident tone is doing a lot of work that the evidence is not.

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u/milan_mensahOP72 points·11 months ago

Germany to Germany: 4 days with FGP and 37 days with TFC. Same route, different carriers, variance is real.

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u/marta_ilunga130 points·11 months ago
this deserves more than 16 upvotes
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u/runa_wikstrom104 points·11 months ago·edited

excursion claims need a logger trace or a photo at unboxing, not "it felt warm"

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u/anders_karlsen101 points·11 months ago

I am going to push back on this slightly.

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u/anjali_tamm66 points·11 months ago

Do you have the logger trace?

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u/brigade_detector60 points·11 months ago

Strongly agree. Peak temperature is not the whole story.

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u/ms_fragmenter17 points·11 months ago

Small correction: the trial was 8 weeks, not 30. Does not change your point but people will quote it.

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u/nadia_kjaer87 points·11 months ago

The confident tone is doing a lot of work that the evidence is not.

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u/kenji_demir42 points·11 months ago

Edit to your parent would help — the concentration you quoted assumes one scenario and you have written another above it.

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u/noor_cardoso57 points·11 months ago

Rodent data is rodent data. Dose scaling is not linear and the models tell you what to investigate, not what to expect.

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u/adaeze_weiss35 points·11 months ago

This is correct. Dry powder is way more robust than liquid.

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u/careful_gradient_again9 points·11 months ago

Edit to your parent would help — the concentration you quoted assumes one scenario and you have written another above it.

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u/nils_ferreira27 points·11 months ago

lane reports need origin, destination, carrier, and actual transit days

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u/milan_mensah7 points·11 months ago

lane reports need origin, destination, carrier, and actual transit days

Yes, exactly this, and it is the bit that took me 55 weeks to accept.

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u/solene_abubakar8 points·11 months ago

Edit to your parent would help — the concentration you quoted assumes one scenario and you have written another above it.

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u/low_appetite_lisa19 points·11 months ago

This is correct.

Yes, exactly this, and it is the bit that took me 87 weeks to accept.

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u/sterile_field_steph13 points·11 months ago

Not to be pedantic but data logger and cold chain are being used interchangeably and they are not interchangeable in real life.

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u/plain_titration_202417 points·11 months ago

customs clearance often breaks the cold chain, factor that in

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u/noor_cardoso0 points·11 months ago

excursion claims need a logger trace or a photo at unboxing, not "it felt warm"

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About c/coldchain

Temperature and stability in the real world: what an excursion actually costs you, why lyophilised powder is far more forgiving than reconstituted solution, how to read a logger CSV, and how to photograph a failed shipment so the conversation with the vendor is short.

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