Would this standout enough against black ink if used for grading papers?

Yes, that is what I use it for. It is a more subtle red than red ballpoint ink.

I have an old a.w.faber castell castello 7 fountain pen -do you know if these cartridges will fit this pen?

I am not familiar with the particular vintage fountain pen. But, if the pen accepts standard size cartridges- it probably does- then, this product should work.

Faber Castell Ink Cartridges Cobalt Permanent Blue Pack Of 6pc

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Fully operational. Shipping worldwide, on schedule.Duty & taxes paid at delivery

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Description

🖋️ Elevate your pen game with ink that means business.

VIBRANT COBALT BLUE - Make your notes pop with a rich, nature-inspired permanent blue hue.
EFFORTLESS WRITING FLOW - Start writing instantly with smooth, even ink delivery—no skips, no delays.
COMPACT CONVENIENT PACK - Six cartridges per pack ensure you’re always prepared for your next big idea.
DOCUMENT PROOF DURABILITY - Smudge-resistant, light-fast, and chemical-proof ink that stands the test of time.
READY FOR EVERY SIGNATURE - Perfect for professional documents—your mark stays bold and unerasable.

Graf von Faber-Castell’s Cobalt Permanent Blue ink cartridges deliver six 0.86 ml refills of premium, indelible ink designed for smooth, immediate writing. Engineered for professionals, this vibrant blue ink is smudge-resistant, light-fast, and chemically durable, ensuring your documents remain crisp and permanent. Packaged in a convenient set of six, these cartridges are the perfect companion for your fountain pen, combining German craftsmanship with lasting performance.

Specifications

ASIN	B00JDATSTM
Best Sellers Rank	#13,840 in Office Products ( See Top 100 in Office Products ) #115 in Pen Refills
Brand	Graf von Faber-Castell
Brand Name	Graf von Faber-Castell
Country of Publication	Germany
Customer Reviews	4.6 out of 5 stars 1,051 Reviews
Global Trade Identification Number	04005401411017
Ink Color	Blue
Item Dimensions	48 x 42 x 8 millimeters
Item dimensions L x W x H	48 x 42 x 8 millimeters
Manufacturer	Graf von Faber-Castell
Manufacturer Part Number	141101
Model Number	141101
Number of Pieces	6
Number of pieces	6
Package Size Name	Pack of 6
Point Type	Fine
Point type	Fine
Style	Cartrige,Cartriges, Ink, Ink Cartridge
Unit Count	6.0 Count

Reviews

M**H

Document Proof Brown Ink

The ink color is very nice and attractive, chocolaty brown. It is also document proof and can be used to sign documents.

26.10.2025

R**N

Easy to use.

Great quality ink!

11.04.2022

K**S

Nicest of the bunch...

These inks are OK, do the job but are no better than others generally speaking, I've got all the GVF range. The brown is the nicest shader I feel...

2.07.2015

B**.

nar kırmızısı

Burned orange ile uyumlu...

30.10.2023

A**R

Mycket trevlig grön färg

Det är en mycket trevlig mörkgrön färg. Jag använder bläcket när jag rättar prov. Jag skriver men EF spets, så man ser ingen linje variation som färgen nog har. Nackdelen är att den är så pass mörk att när jag skriver kan det vara svårt att skilja från den svarta färgen som eleverna skriver med.

28.10.2023

M**O

Demasiado cara

El precio es demasiado por cartucios normales no tiene nada de diferente de lo otros

5.04.2024

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Trustpilot

TrustScore 4.5 | 7,300+ reviews

Ravi S.

I loved the variety of products available. Will definitely shop again.

2 months ago

Abdullah B.

Great price for an authentic product. Fast international shipping too!

3 weeks ago

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€ 6.79

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Sold byAmazon CroatiaDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Trustpilot

TrustScore 4.5 | 7,300+ reviews

Anjali K.

The product quality is outstanding. Exactly what I needed for my work.

1 month ago

Khalid Z.

Great experience from order to delivery. Highly recommended!

1 week ago