Do the flutes always run lengthwise?

They are 12x12 and run which ever direction you turn them.

Where are these boards made and are they acid free for artwork/painting?

The flat corrugated cardboard is made of quality material, through strict process, to ensure safe and reliable use, not easy to break or deform, strong to serve you for long time. These products are made in China.

Can you use craft paint on these without them warping or falling apart?

I don't know, we didn't paint on them. I would think though if you did paint and it wasn't too heavy it should be ok.

50 Pack Brown Corrugated Cardboard Sheets Flat Inserts Squares Separators For Art Projects Diy Crafts Supplies (4 X 6 Inch)

产品编号: 400613316

细节

Brand
Zonon
Colour
brown
Material
Cardboard
Product dimensions
16L x 13W x
Item weight
0.35 Kilograms

📏4x6 inch perfect size

📦50 sheets for bulk projects

🛡️20 kg breaking strength

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RM209

Duties & taxes included

In stock

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描述

🛡️ Guard your creativity and shipments with strength and style!

BULK READY FOR EVERY PROJECT - 50 durable sheets to fuel your creativity and shipping needs without running out.
PERFECTLY SIZED FOR VERSATILITY - Compact 4x6 inch sheets fit seamlessly into mailers, portfolios, and craft projects.
UNMATCHED STRENGTH PROTECTION - Withstands up to 20 kg, ensuring your art, documents, and parcels arrive flawless.
PREMIUM QUALITY CORRUGATED CARDBOARD - 3mm thick, eco-friendly material designed for long-lasting support and protection.
MULTI PURPOSE CRAFT SHIPPING ESSENTIAL - Ideal for DIY crafts, art projects, and as a reliable mailer insert to prevent bending.

This 50-pack of 4x6 inch brown corrugated cardboard sheets offers professional-grade protection with a 20 kg breaking strength. Perfect for art projects, DIY crafts, and secure shipping, these 3mm thick inserts prevent bending and damage, making them an essential tool for managers and creators who demand reliability and quality in every package.

规格

ASIN	B09J217BBG
Brand	Zonon
Brand Name	Zonon
Breaking Strength	20 Kilograms
Breaking strength	20 Kilograms
Color	brown
Colour	brown
Country of Publication	China
Customer Reviews	4.5 out of 5 stars 471 Reviews
Item Dimensions L x W x H	16L x 13W x 10H centimeters
Item Type Name	cardboard
Item Weight	0.8 Pounds
Item weight	0.8 Pounds
Manufacturer	Zonon
Manufacturer Warranty Description	/
Material	Cardboard
Material Type	Cardboard
Product dimensions	16L x 13W x 10H centimeters
Unit Count	50.0 Count

B**R

Good product

7.01.2026

H**Y

Great product

7.02.2026

K**.

Barbie Doll Sized Cardboard

4.01.2026

S**C

Nice quality

25.12.2025

M**U

Great for thank you craft

30.11.2025

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