Dear Michiel, There will never be M1 characterization data for the "older web offset" profiles. Your old M0 profiles should work perfectly fine under your new "D50" lamps. MfG / Roger Breton www.graxx.ca From: Michiel Verbeemen &lt;Michiel-Verbeemen(a)emdejong.nl&gt; Sent: Monday, August 24, 2020 4:43 AM To: eci-en(a)lists.callassoftware.com Subject: [ECI-EN] Question about M1 measurment conditions Good morning, I have a question about the measurement conditions in web- and sheet offset production. We print on a great amount of papers in web offset: standard newsprint, improved newsprint, SC, SC-B, MFC, LWC-Improved, LWC-standard, coated and uncoated. In sheetfed offset we print on coated and uncoated paper. With the arrival of the new M1 measurement condition, we replaced all our illuminant A lamps into D50 lamps. The problem is, we don't have M1 measurement references for the older web offset profiles. So now we have new lamps (M1), a capable measurement device (M0 + M1) but we have mostly M0 reference values (exceptions are the newer profiles F51, F52 and F54). Will there come a publication with new M1 references for the older web offset profiles? And when yes: is there already a date of publication? Thank you in advance. Met vriendelijke groet, Michiel Verbeemen Prepress Productieleiding Email: Michiel-Verbeemen(a)emdejong.nl <mailto:Michiel-Verbeemen@emdejong.nl> Telefoon: +31 13 507 5585 Voordelig en snel uw drukwerk bestellen? Kijk dan nu op onze nieuwe website <http://emdejongdirect.nl/> emdejongdirect.nl !