tag:blogger.com,1999:blog-1840985738235902482.post5864913609436735342..comments2024-03-27T07:14:48.488-04:00Comments on John the Math Guy: Expanded gamut - when an idea's time has comeJohn Seymourhttp://www.blogger.com/profile/11350487038873935295noreply@blogger.comBlogger5125tag:blogger.com,1999:blog-1840985738235902482.post-8389864045307855212020-04-14T13:28:52.929-04:002020-04-14T13:28:52.929-04:00nice information. keep posting this blog to help t...nice information. keep posting this blog to help the beginner. <a href="https://www.wingsembroidery.com/color-separation.php" rel="nofollow">Color Separation</a>Lucy Carterhttps://www.blogger.com/profile/11597576688029052850noreply@blogger.comtag:blogger.com,1999:blog-1840985738235902482.post-26236395628096859512018-05-06T18:45:42.348-04:002018-05-06T18:45:42.348-04:00Thanks Jim! I greatly appreciate hearing this fir...Thanks Jim! I greatly appreciate hearing this first hand account!!!John Seymourhttps://www.blogger.com/profile/11350487038873935295noreply@blogger.comtag:blogger.com,1999:blog-1840985738235902482.post-1822320145211157942018-05-06T17:51:43.155-04:002018-05-06T17:51:43.155-04:00I began working in Graphic Arts Enginering at Hall...I began working in Graphic Arts Enginering at Hallmark Cards right out of college in the mid-1960's. Hallmark was indeed printing many of their cards and other products with an expanded color gamut, using 6-colors. (long scale: Lt. cyan, fluorescent yellow, and fluorescent pink, and short scale: cyan, magenta, and black) This system was developed to allow our printed product to match the artwork from the 600+ artists in the Creative Division. (Oil, watercolor, assemblages, fabric, etc. Transparencies were separated for 4-c or 5-c, with a short scale red) Every quarter, random samples were pulled from our Distribution Center and placed in a display room along side the original artwork. Senior management would then grade how well the Graphic Arts Division matched and produced the artwork for that group of samples. In the 1960's, 6-c separations were created with custom, internally made, process cameras using our own electronic exposure controls created by our Graphic Arts Research Department. For several years the 6-c printing was done on 2-c presses, because 4-c presses of that era printed with too much dot gain. Working with our press suppliers, it was later possible to develop 3-c, then 6-c, later 8-c perfecting and finally 10-c perfecting presses, that could print the heavy ink film required for our very clean inks, without significant dot gain, usually on uncoated board stock. One of the challenges of Graphic Arts Engineering was making sure the 13 printers printing our products at that time, all printed to Hallmark's halftone and solid ink density standards, which allowed us to produce the needed 8-12 million cards per day.Jim Rhttps://www.blogger.com/profile/09145926053154242474noreply@blogger.comtag:blogger.com,1999:blog-1840985738235902482.post-14860310825128054782018-04-24T09:07:13.631-04:002018-04-24T09:07:13.631-04:00Hi John, I remember at the Graphic Arts Technical
...Hi John, I remember at the Graphic Arts Technical<br />College where I work, about 15 years ago we used Opaltone<br />software to produce seven colour separations on the Crosfield Celsis drum scanner. CMYK plus Red, Green and Blue/violet to print in the saturated areas to extend the colour range. Results were definately an improvement.vtsaccounishttps://www.blogger.com/profile/08085959378770387786noreply@blogger.comtag:blogger.com,1999:blog-1840985738235902482.post-3348859597779341122018-04-12T22:43:20.217-04:002018-04-12T22:43:20.217-04:00Great post John as usual.Great post John as usual.The Ellis Familyhttps://www.blogger.com/profile/01206623058421380592noreply@blogger.com