Evaluating the printing label

Danisa

Starting to get Involved
#1
Hi all,
I am quality assurance engineer and now we are developing the new label supplier.
Our labels will be pasted on both plastic products and carton box.
Of course, the cosmetic is important, the printing characters must be clear.
I don't know how can I evaluate whether the printing characters be easy to be blurred as time?
Anyone who has experience this field please advise me.
Thank you very much in advance!
Best regards!
 
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Ninja

Looking for Reality
Trusted Information Resource
#2
Howdy Danisa, and welcome.

If it helps...we shipped our test labels (on the outside of the package) using UPS and FedEx and US Mail to California and back...not many things are as rough as those...
water, saltwater and other chemical exposures likely are also normal use tests...
 

Danisa

Starting to get Involved
#3
Hi, Ninja,
Thank you very much for your information,
I only wonder how can I test and evaluate the quality of label.
Anyway, thank you and wish you happy, :D
 
#6
My company (medical devices) does label durability testing in house.

It kind of depends on how critical your labeling is, what the material of your label is made out of and the environment it’s going to be used in.

One of the tests we do anyone could do, the other requires a special device that simulates storage and transport conditions.

For the general test we use isopropyl alcohol, ethyl alcohol and detergent. Using a cotton swap we rub sections of the label for 15 seconds with each chemical. If there is any significant smearing or ink removal it would fail testing.
If you google label durability testing you should find quite a few articles about similar tests.
 
Last edited:

BCote

Starting to get Involved
#8
My company (medical devices) does label durability testing in house.

It kind of depends on how critical your labeling is, what the material of your label is made out of and the environment it’s going to be used in.

One of the tests we do anyone could do, the other requires a special device that simulates storage and transport conditions.

For the general test we use isopropyl alcohol, ethyl alcohol and detergent. Using a cotton swap we rub sections of the label for 15 seconds with each chemical. If there is any significant smearing or ink removal it would fail testing.
If you google label durability testing you should find quite a few articles about similar tests.
I've been doing similar testing (DI Water, Isopropyl, and Ethanol) for alternate label stocks due to current supply chain issues. The example I found is in ISO 20417. Another thing it includes is testing for processing cycles. For a labeled vial, I usually do enough open/close cycles with a gloved hand to cover the maximum test count plus one. And, with UDI requirements, I've also started ensuring the 2D barcode passes verification after the durability testing is complete.

Full disclosure, we haven't had an external auditor review one of my memos yet...but at least it's something. The only thing I need to do is probably make a more formal process out of it. So far, it seems to work out pretty well. I've been able to qualify and disqualify a couple of options already.
 

ChrisM

Involved In Discussions
#9
I once worked for a company that manufactured and sold stuff designed to be used under water. We had to ensure that labels remained readable after months of immersion (continual submersion) in sea water. We had our own water tanks. No substitute for in-house trials.....
 
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