RE: colorsync-users Digest, Vol 16, Issue 35
RE: colorsync-users Digest, Vol 16, Issue 35
- Subject: RE: colorsync-users Digest, Vol 16, Issue 35
- From: Roger Breton via colorsync-users <email@hidden>
- Date: Mon, 17 Jun 2019 23:14:37 -0400
Thank you, Malcom.
You're right, the whole thing needs to be assessed, not just the tubes.
I superimposed the spectrum image you sent with the one from my humble Excel
sheet (tried to aligned them at 560nm) and it is clear that the new tubes
have more energy around 360nm.
https://1drv.ms/u/s!AkD78CVR1NBqkLUuwGMsH5ObGTay4A
I still wonder what the visual difference is like, the same print viewed in
two light booths, one with the old lamp and one with the new, E tubes? If
the substrate incorporates a lot of OB, like b* = -6.00, the booth with the
new lamps should make all color appear "bluer" overall, right?
/ Roger
-----Original Message-----
From: colorsync-users
<colorsync-users-bounces+graxx=email@hidden> On Behalf Of
Malcolm Mackenzie via colorsync-users
Sent: Monday, June 17, 2019 5:00 AM
To: email@hidden
Subject: Re: colorsync-users Digest, Vol 16, Issue 35
Re; 1. ISO-3664:2009 illumination (email@hidden)
Hello Roger
Just to add, if the luminaire uses a glass or plastic cover you have to
check if it is effectively UV filtering. Most old and many modern ones are.
Below is a GTI reading, no glass which is 3664:2009 compliant.
[image: GTI.png]
regards
Malcolm Mackenzie
Colour Engine
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