Can yo use this type of conductive ink to cut glasss in the microwave?

I would not put this in the microwave.

Could this be used to repair electric circuit in a car?

Yes, I used it to repair the circuit board on a dishwasher

Will this pen work in an upside down condition? For example, an angled rear car glass with a defroster broken trace.

If aesthetics are of little concern, this will probably work. What I would do is clean the broken trace with isopropyl alcohol 91%. Retrace with this pen, test, then apply 2-part clear epoxy over the retrace to protect it <important if you don’t want the morning dew to dissolve the ink the next day. you may have to lightly sand the broken trace beforehand if the ink doesn’t stick well also may have to lightly sand the protective coating of the 2 unbroken trace ends, so this ink will be able to conduct. It may be tricky using this upside down, in which case maybe dab the ink onto a small brush and apply that way.

Need to fix accidentally removed solder pads on car key fob is it possible to add actual solder after dry to connect thin wire?

The conductive ink isn't likely to take solder - you could just tape the wires down onto the ink lines, but not for permanent installation.

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Conductive Ink Pen

Q: Need to fix accidentally removed solder pads on car key fob is it possible to add actual solder after dry to connect thin wire?

The conductive ink isn't likely to take solder - you could just tape the wires down onto the ink lines, but not for permanent installation.

Product ID: 297787375

Details

Age range (description)
Adult
Brand
Circuit Scribe
Colour
Silver
Ink colour
Silver
Writing instrument form
Roller Ball

⚡Silver conductive ink with <2 Ω/cm resistivity

📏Draws 60-200 meters per pen

🖊️0.5mm precision rollerball tip

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Description

⚡ Sketch. Connect. Innovate. The future of prototyping in your hand.

PRECISION SILVER INK - 0.5mm rollerball tip delivers smooth, highly conductive lines with ultra-low resistance.
ECO FRIENDLY INNOVATION - Replace bulky electronics prototyping tools with a sleek, pen-sized solution.
DOODLE YOUR OWN CIRCUITS - Transform any paper into a live circuit board—no breadboards or wires needed.
INSTANT PROTOTYPING POWER - Snap on Circuit Scribe modules to bring your sketches to life in seconds.
VERSATILE SURFACE COMPATIBILITY - Works on napkins, photo paper, and more—up to 200 meters of continuous conductive ink.

The Circuit Scribe Conductive Ink Pen is a revolutionary rollerball pen that writes with silver conductive ink, enabling users to draw functional electrical circuits on any writable surface. It replaces traditional breadboards and wires by allowing quick attachment of specialized modules to ink-drawn lines, supporting up to 200 meters of conductive tracing with ultra-low resistance (<2 ohms/cm). Ideal for rapid prototyping, education, and creative electronics projects.

Specifications

ASIN	B00OZATJ3A
Best Sellers Rank	#55,737 in Office Products ( See Top 100 in Office Products ) #431 in Liquid Ink Rollerball Pens
Brand	Circuit Scribe
Closure	Soldering
Color	Silver
Customer Reviews	4.1 4.1 out of 5 stars (1,278)
Date First Available	27 January 2015
Grip Type	smooth
Ink Color	Silver
Item Weight	10 g
Line Size	0_5mm
Manufacturer	Circus Pro 525727720
Manufacturer Part Number	CS-KS-PEN-1X
Material Type	Paper
Model number	CS-KS-PEN-1X
Number of Items	1
Pencil Lead Degree (Hardness)	H
Point Type	Ball
Product Dimensions	15.24 x 1.02 x 1.02 cm; 10 g
Size	1 count (Pack of 1)

Reviews

D**N

Pen

Good conductivity

9.02.2024

M**S

Good one

Worthy for the price

31.01.2024

M**H

I use these pens frequently in the physics labs I teach and have never had any issues with the ink or its conductivity. Whether you’re experimenting with conductive ink or using it for practical projects, they’re an excellent choice—just be sure to let the ink dry completely before applying any current.

2.11.2025

C**E

Reçu dans les délais, conforme à la description, pédagogique et ludique pour les enfants, j'ai testé et les contacts sont fait sur une feuille de papier !

27.11.2022

P**Z

Lo he itilizado para arreglar un teclado antiguo y ha funcionaso bien

7.01.2024

H**1

Genau, was ich gesucht habe! Spitze ähnlich eines Kugelschreibers. Sehr feine Striche möglich und die Leitfähigkeit ist Spitze! Tipp: Sollte nichts aus der Spitze kommen, einfach kurz kräftig schütteln. Dann gehts weiter. Kleckert nicht, ist präzise und Preis/Leistung sehr gut.

5.02.2022

G**E

Worked great

17.09.2023

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