This picture shows a perfect square but the dimensions are 100mm x 70 mm [ For 'murica boys thats... 4 x 2 3/4 inches ] approx

the PC material was 100mm x 70mm as stated. As I recall, they offered several different sizes and I suppose the photo was of PC board of the type they sold.

what type of substrate was used in the production of these boards?

The description now indicates that these are FR-4 boards.

Is this what i need to replace pad where i used braided copper to remove solder and it removed all of it?

This item is a blank circuit board - it's solid copper on one side and nothing on the other. It wouldn't be a suitable replacement for one pad on a circuit board, but it could be used to make a new one.

Has anyone used this to create etchings for intaglio printing?

SORRY CAN'T ANSWER THAT..... I ONLY USE COPPER CLAD BOARDS TO MACHINE THE TRACES AND COMPONET HOLE SIZES ON MY CNC MILL FOR THE PROJECTS I DESIGN ON MY CAD SYSTEM........ THIS METHOD WORKS GREAT FOR ME IN THE EVENT I NEED TO CHANGE SOMETHING......

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MCIGICM FR-4 Copper Clad PCB Laminate Circuit Board, Single Side, 4 x 2.7 inch (10Pcs)

Product ID: 350174721

Details

Brand
MCIGICM
Material
Glass Copper
Number of circuits
1
Phase type
Single Phase
Product dimensions
10.2L x 6.9W x

📏Compact 4x2.7 inch size

🔧Single-sided copper clad for easy etching

🛡️FR-4 flame resistant fiberglass

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Sold byAmazon VietnamDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

⚡ Empower your innovation with pro-grade PCB essentials!

BULK PACK ADVANTAGE - 10 high-quality boards per pack to fuel your creative momentum without interruption.
PRECISION DIY READY - Compact 4" x 2.7" boards perfect for prototyping and custom circuits.
RUST PROOF PACKAGING - Moisture-sealed bags keep copper pristine, so your projects start flawless.
DURABLE FLAME RESISTANT - FR-4 fiberglass backing ensures safety and longevity in your projects.
EFFORTLESS ETCHING SURFACE - Single-sided copper plating offers smooth, reliable etching every time.

MCIGICM FR-4 Copper Clad PCB Laminate Circuit Boards are single-sided, 4 x 2.7 inch copper-plated fiberglass boards designed for DIY etching and prototyping. Each pack includes 10 durable, flame-resistant FR-4 boards, moisture-sealed to prevent rust, making them ideal for millennial makers and professionals seeking reliable, compact circuit solutions.

Specifications

ASIN	B01MCVLDDZ
Brand Name	MCIGICM
Customer Reviews	4.6 4.6 out of 5 stars (585)
Grade Rating	good
Item Dimensions L x W x H	10.2L x 6.9W x 1.4H centimeters
Item Weight	210 Grams
Manufacturer	McIgIcM
Material Type	Glass, Copper
Model	43188-169417
Number Of Circuits	1
Part Number	43188-169417
Phase Type	Single Phase
UPC	710185832531
Unit Count	10 Count

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