Ballpoint ink dating heating


28-Sep-2017 06:49

ballpoint ink dating heating-49

jennifer capriati dating news

He had studied medicine, art, and hypnotism, and in 1935 he was editing a small newspaper-where he was frustrated by the amount of time he wasted filling fountain pens and cleaning up ink smudges.

Besides that, the sharp tip of his fountain pen often scratched or tore through the newsprint (paper).

The Biro brothers returned to their laboratory and devised a new design, which relied on "capillsry action" rather than gravity to feed the ink.

The rough "ball" at the end of the pen acted like a metal sponge, and with this improvement ink could flow more smoothly to the ball, and the pen could be held at a slant rather than straight up.

Because many of the patents had expired, Reynolds thought he could avoid any legal problems, and so he went about copying much of the Biros’ design.

John Loud’s pen was never produced, nor were any of the other 350 patents for ball-type pens issued over the next thirty years.

For the pen to regain the public’s favor and trust, somebody would have to invent one that was smooth writing, quick drying, nonskipping, nonfading, and most important didn’t leak. Frawley met Fran Seech, an unemployed Los Angeles chemist who had lost his job when the ballpoint pen company he was working for had gone out of business.



Read "DATINK pilot study An effective methodology for ballpoint pen ink dating in questioned documents, Analytica Chimica Acta" on DeepDyve, the largest online.… continue reading »


Read more

Age Determination of Ballpoint Pen Ink by Thermal Desorption and Gas. of ink solvent from ink on paper is not a suitable method for ink dating.… continue reading »


Read more

The longevity of the ink depends on the pen, but most are about 6–8 months. If the pen dries up, you can try heating up the ballpoint part with hot water.… continue reading »


Read more