How long would these Pilot Precise V5 Black pens last UNUSED? Like, just laying around, would they dry up if I don't use all 12 fast enough?

A very long time. I've been using these pens for about 12 years now. I have an approximately 10-year-old pen (still the old grey design) that's gone strong. Also a box of the newer style (black, like what's in the picture) that are probably 8 years old now. They just keep writing. Keep the cap on 'em and you'll be fine for a decade or more.

I've used these pens since grade school in the 80's. I never have luck on airplanes. I even tried this past time to leave the cap not shut all the way as others say helps. Nope! Ink all over the top. I wonder if it's also type of plane. I'm on both the big 737's from major airports to little puddle jumpers to smaller regional airports during the same trip. Maybe the bigger planes are less of a problem? Wish I knew cause the pens aren't cheap and hate loosing them to explode ink on my plane trips!

Is the ink resistant to chemical solvents? Is this a good choice to use in a wet lab notebook?

No no no. It's my favorite pen in the whole world. Great for notebooks and student lab notebook for inside chem labs and such, but the ink does take time to dry. I think for you needs the ink would smear.

Does it bleed through?

That would depend on the material you are writing on. If it’s tissue paper then yes it would bleed through. They are fine on regular copy paper or anything heavier.

ASIN	B00006IEBI
Best Sellers Rank	#23,422 in Office Products ( See Top 100 in Office Products ) #590 in Retractable Ballpoint Pens
Brand	Pilot
Closure	Retractable
Color	Black
Customer Reviews	4.8 4.8 out of 5 stars (24,319)
Date First Available	8 August 2012
Grip Type	Non Rubberized
Ink Color	Black
Item Weight	129 g
Line Size	0.5mm
Manufacturer	Pilot Pen
Manufacturer Part Number	35334
Material Type	Plastic
Model number	35334
Number of Items	1
Pencil Lead Degree (Hardness)	HB
Point Type	Extra Fine
Product Dimensions	2.54 x 7.11 x 14.61 cm; 129.27 g
Sheet Size	a4
Size	12 Count (Pack of 1)
Tip Type	Needle

Pilot Precise V5 Stick Liquid Ink Rolling Ball Stick Pens, Extra Fine Point (0.5mm) Black Ink, 12-Pack (35334)

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