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Recommendations for testing the treatment level on film


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#1 GPER

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Posted 17 December 2020 - 07:36 PM

Hello All -  We have been using Dyne Pens for some time to check for treatment levels.  Recently we discovered the dyne pens were becoming contaminated and supplying accurate results.  We then switched to liquid in which we dip a one time use swab into it and perform the test.   I have come across a problem with testing treat on an embossed film.  Neither the pens or the ink give a conclusive result.  Does anyone have a recommendation on a product that would give a conclussive result on treatment level?



#2 Charles.C

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Posted 17 December 2020 - 09:06 PM

Hello All -  We have been using Dyne Pens for some time to check for treatment levels.  Recently we discovered the dyne pens were becoming contaminated and supplying accurate results.  We then switched to liquid in which we dip a one time use swab into it and perform the test.  

 

I have come across a problem with testing treat on an embossed film.  Neither the pens or the ink give a conclusive result.  Does anyone have a recommendation on a product that would give a conclussive result on treatment level?

 

Can you clarify what "system" you are talking about ? eg -

 

treatment level = ?

treat = ?

product = ?


Kind Regards,

 

Charles.C


#3 GPER

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Posted 17 December 2020 - 10:34 PM

Treatment = Y/N

Treat = spec of 42 to 46

Produce + Embossed Film

 

Neither the pens or the ink are conclusive for the identification of treat or treat levels on this type of film.



#4 beautiophile

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Posted 18 December 2020 - 01:28 AM

Different testing/measurement methods give different results for the same quantity. That's a fact. Each one has their own accuracy and repeatability, which helps to validate its usage. These two factors can be calculated by statistics. (Wikipedia ref)

AFAIK, both dyne pen or liquid are binary tests. The result is either passed (>42 Dyne) or failed (<42 Dyne). It means they are qualitative not quantitative. Other said, they are not suitable to determine precisely the level of surface tension even though the test use various types (42, 46, 50, etc.).

IMEX, the acceptable scale of film treatment often has a wide range. One test at the middle low value (43 in your case) is good enough for daily judgments. And a regular (annual or semi-annual) assurance test with several levels (40 to 50 dyne) should be performed for validation.


Edited by beautiophile, 18 December 2020 - 01:28 AM.


#5 Charles.C

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Posted 18 December 2020 - 01:40 AM

Different testing/measurement methods give different results for the same quantity. That's a fact. Each one has their own accuracy and repeatability, which helps to validate its usage. These two factors can be calculated by statistics. (Wikipedia ref)

AFAIK, both dyne pen or liquid are binary tests. The result is either passed (>42 Dyne) or failed (<42 Dyne). It means they are qualitative not quantitative. Other said, they are not suitable to determine precisely the level of surface tension even though the test use various types (42, 46, 50, etc.).

IMEX, the acceptable scale of film treatment often has a wide range. One test at the middle low value (43 in your case) is good enough for daily judgments. And a regular (annual or semi-annual) assurance test with several levels (40 to 50 dyne) should be performed for validation.

 

Thank you for the above clarification as to what is going on.

 

Never heard of dyne pen to measure surface tension.


Kind Regards,

 

Charles.C


#6 GPER

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Posted 28 December 2020 - 05:31 PM

Thank-you for clarifying the process I am using.  I misunderstood Charles's question previously.

 

Have you used other methods to measure surface tension?






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