Tag: International Organization for Standardization

  • Ink Lightfastness Tests

    Ink Lightfastness Tests

    Weird to be presenting lightfast tests in the darkest time of the year but since last summer I have been testing the various inks I use for lightfastness, and here are the results. Lightfastness is the way pigments and dyes react to UV light – if they aren’t lightfast they fade or shift in colour…

  • 5PM Challenge 88-106

    5PM Challenge 88-106

    This highlights roundup has been much delayed, although I have been busy drawing with new pens, new ink and new pads. I’ve been continuing to use the FPR Himalaya v2 Ultraflex for months and loved it, but found it does railroad quite a lot with R&K Sketchink especially when flexing, and my unique FPR ink…