What temperature can these be fired to?

I answered this in a previous question, but given the color it exhibits in a burner flame, I would estimate beyond 1200-1300 C. The material doesn't melt in a gas burner top flame.

What is the highest temperature this will go to?

I can't tell you the top end temperature with certainty, but the material has a lot of similarity to Fiberfrax alumina mat and this is good well beyond 1000 C. I put one of my sheets in a stovetop burner flame and it does not melt and will go on to glow a lot like a lantern mantle, which I would estimate to be above 1300C, but this is just an educated guess. There is an organic binder which burns off when heated, but after this the material becomes very white and very difficult to handle afterwards, since there isn't anything to keep the fibers together, so consider each disc single use. I'm actually impressed with the papers and wished I had known about them earlier.

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100 Sheets Round Microwave Kiln Papers 4.7 Inch Ceramic Fiber Paper Insulation Ceramic Fiber Blanket for Glass Fusing DIY Crafts Supplies

Product ID: 515481133

Details

Brand
Jutom
Material
Ceramic
Item Form
Sheet
Sheet Count
100
Sheet Size
4.7 inches/ 12

B/.93

Duties & taxes included

In stock

Sold byAmazon PanamaDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Details

Brand
Jutom
Material
Ceramic
Item Form
Sheet

Description

100 Sheets Round Microwave Kiln Papers 4.7 Inch Ceramic Fiber Paper Insulation Ceramic Fiber Blanket for Glass Fusing DIY Crafts Supplies

Specifications

Number of Items	100
Paper Size	4.7 inches/ 12 cm
Sheet Count	100
Color	White
Item Form	Sheet
Material Type	Ceramic

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