To create folium ink, medieval manuscript makers extracted concentrated pigment from C. tinctoria, soaked a piece of cloth in the purple-blue solution and let the fabric dry. They then reactivated ...

Why do blue highlighter markers never seem to have the high luminosity of pink, yellow, orange and light green highlighters? Guy Cox, Sydney, New South Wales, Australia There are two reasons for this.

The iron in the blood turned the mixture light blue. Image Toronto Ink Company sells inks through its website, an Instagram following of almost 32,000 and at some art-supply stores in Japan, the ...

Black and blue ink are the only colors the Maricopa County election machines can read. That's why it mattered when a reporter from The Arizona Republic questioned why counters for the hand recount ...

Fans must have the right color ink to get an autograph from Claire Foy, it seems. "The Crown" actor recently turned down a fan's request for an autograph because it was blue, per a video initially ...

Ink is tough to get out, but not impossible—especially if you know a few tricks. Here is how to get ink stains out of clothes without stress.

A tattoo artist at work in Berlin on June 12, 2020. The European Commission is phasing out some types of tattoo ink, including those that include two widely-used blue and green pigments.

What and who makes these inks so formidable? Mysore Paints & Varnish Ltd. (MPVL), a Karnataka government company since 1962, is the unsung hero behind India’s reliable and trusted indelible ink.

All of my notes are in blue ink because writing in blue ink is supposed to help with remembering information. I don’t really know if that’s true, but I write in blue ink anyway. Maybe it’s a myth, ...