Re: Yellow too high on GRACoL 7
Re: Yellow too high on GRACoL 7
- Subject: Re: Yellow too high on GRACoL 7
- From: "Roberto Michelena" <email@hidden>
- Date: Thu, 6 Apr 2006 20:39:12 -0500
> I suppose part of the problem here is that there appears to be no standard scientific or mathematical way of assessing OB.
Steve, I'm not quite sure this is true; some time ago when googling I
found laboratory instruments targeted to "the paper manufacturing
industry" with the single purpose of measuring OBs. If I recall
correctly the units in which they measured were alien to me.
So I wouldn't be surprised that deep inside the secret chamber of
every paper manufacturer, there lies a spec for each paper produced
that accurately describes the content and even kind of optical
brighteners used.
-- Roberto Michelena
Infinitek
Lima, Peru
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