Variations in color in printing ink is somewhat common in stamp production, but the "variance" in this case ventured into a different color completely -- orange.
en.wikipedia.org The company diversified into paint and printing ink manufacturer from 1865.
en.wikipedia.org They sell to a wide range of industries like fireworks, paint, printing ink, mining explosives, ordnance, space, cutting tools, brake linings etc.
en.wikipedia.org It has a tackifying effect and is suitable for use in paint, printing ink, adhesives, rubber and other areas where tackiness is required.
en.wikipedia.org As a drying oil similar to tung oil or linseed oil, perilla oil has been used for paints, varnishes, linoleum, printing ink, lacquers, and for protective waterproof coatings on cloth.
en.wikipedia.org