Can you write on this causing a magnetic image to appear if you attached a small neodymium magnet to the end of dried up pen?

Only if you have a small enough magnet, otherwise the characters would be so large you could only write one word.After reading "Sadly, no." I tried with a small motor magnet and was able to produce "123" and "Hi" that were legible from the front.Not sure if that is useful for you.

Will this show the tracks on magnetic audio tape?

Not usefully. It might just show some magnetic field on a cleverly recorded tape (eg: Like a lightning flash recorder), but neither the resolution nor the contrast would show normal audio tracks. That is simply not it's function.

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Magnet Source Magnetic Field Viewer Card (Pack of 1)

Magnet Source Magnetic Field Viewer Card (Pack of 1)

Product ID: 335043900

Details

Brand
Master
Colour
Blue
Manufacturer
0
Material
Plastic
Net Quantity
1.0 Count
Number of Packs
1

📏Compact 2.5" x 4" size

🔵Vibrant blue magnetic film

🛡️Durable laminated plastic

€ 30.22

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Description

🔵 See the unseen—magnetism at your fingertips!

LAMINATED FOR LONGEVITY - Robust plastic lamination ensures your viewer card withstands daily use without wear.
INSTANT MAGNETIC FIELD REVEAL - Specialized film instantly visualizes magnetic fields, making invisible forces visible.
MADE IN THE USA WITH PRECISION - Crafted domestically to guarantee quality and reliability you can trust.
POCKET SIZED MAGNETIC EXPLORER - Fits effortlessly in your wallet or toolkit for on-the-go magnetic field visualization.
EDUCATIONAL PROFESSIONAL TOOL - Perfect for STEM enthusiasts, educators, and professionals to demonstrate magnetism with flair.

The Magnet Source Magnetic Field Viewer Card is a compact, laminated 2.5" x 4" tool featuring a specialized blue film that reveals magnetic fields instantly. Designed for durability and portability, this USA-made card is ideal for educators, professionals, and curious minds seeking a hands-on magnetic experience.

Specifications

ASIN	B005HYCM8M
Best Sellers Rank	#88,774 in Toys & Games ( See Top 100 in Toys & Games ) #6,143 in School Supplies
Brand	Master Magnetics
Colour	Blue
Country of Origin	USA
Customer Reviews	4.2 4.2 out of 5 stars (196)
Enclosure Material	Plastic
Global Trade Identification Number	00095421005635, 10095421005632
Item Type Name	magnetic
Manufacturer	0
Manufacturer Part Number	DMVC-1BX
Model number	DMVC-1BX
Number of Packs	1
Number of Pieces	1
Shape	Rectangular
Size	2.5 x 4 inch
UPC	095421005635
Unit Count	1.0 Count

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Our prices include the product cost, international shipping, import duties, customs clearance, and local delivery charges. We handle all customs and import procedures, ensuring there are no hidden fees upon delivery. PRO members receive additional benefits including free shipping.

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Excellent communication throughout the order process. Product is perfect.

2 weeks ago

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€ 30.22

Duties & taxes included

In stock

Sold byAmazon SlovakiaDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to Slovakia.

Secure transaction

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TrustScore 4.5 | 7,300+ reviews

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Received my product in pristine condition. Great service overall.

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