Mica sheets F.A.Q.

F.A.Q about stove mica sheets.

What is Mica ?
Mica is a silicate mineral that is mined from the earth. Mica can be processed into very thin sheets relatively easily because of it's chemical structure. It looks like a lump of dirty quartz crystal when mined.

How is it processed ?
When it is being processed it is split through it's laminations into sheets as you would slice a potato.
The first usable sheets of mica are made in to the 1" x whatever size sheets and so on until the middle which is the maximum size that the rock will yield eg: 3" x 4"

What is the thickness of your mica sheets
The Thickness of our mica sheets is between: 0.004 / 0.006”, but if you need the mica for a different application you can slice it down to your desired thickness with a scalpel.

Why do the prices for the larger panels seem disproportionate ?
Rocks of mica are seldom found in large pieces, imagine the value of a hundred little diamonds and one the size of your fist, and it may make sense. Add to that, as they process through the rock there are masses of areas that aren't transparent and also sheets with bad blemishes and discolouration etc that is running through the mica, and is only suitable for electrical mica.
( mica is one of the only things that can take extreme temperature and is a non conductor, what else could you use in a metal clothes iron! )
Once they have graded the mica for stove quality the pile of 8" x 8" sheets are looking pretty small, compared to the 3" x 3" s.

How do you grade your sheet mica ?
All mica has a slight tint and as with all natural products there sometimes can be graining and markings etc if you held it to a piece of white paper, but this doesn't show in the stove. Our mica is sourced from only the best mines, they grade it for stove quality, then I hand grade every sheet to keep the quality even higher. Therefore our mica is as clear and as uniform as a natural product can be.
I sell the lower quality off for electrical mica or workshop stoves etc.
Check it out here.

How do I know if it's mica I need ?
Mica sheets are transparent, and when old and well used, they are sometimes yellowy in colour and opaque and can start to de-laminate, but the best way of telling if it's mica or not, is to see if it's flexible, one of the best advantages of mica is that it will bend to fit bowed wood burner doors or lanterns etc. Most stove makers stopped using mica with the introduction of ceramic heat resistant glass, since then nearly all stove doors are now flat, as curved glass would cost a fortune to produce.

Is it one large sheet or lots of little ones in my stove ?
On old stoves, especially French stoves, the window is more than often fitted with a small panel or several panels made of mica, these window panes tended to be quite small, because mica sheets are relatively delicate and small are far less expensive to buy than large ones .

Can I just by a big mica sheet and cut it up ?
By all means, but it would be like filing of the corners of a 50 pence piece to make a 10 pence piece!
please take a little time to see how many mica panels are in your stove as 4 panes at 4"X 4" = £15.96 is cheaper than 1 pane at 8"X 8" = £39.99.

How do I check how many mica sheets I need ?
There will be some sort of frame or cage on the back of the stove door that holds the individual mica panes.
The frame-work can be fixed in many different ways, but normally bolts, engineers screws or split pins.
Undo the mica frame-work and measure the mica windows.

How easy is it to cut mica ?
Mica is very easily cut with a craft knife or scissors, it can be cut to any size and shape quickly by yourself to fit your wood burner, stove or boiler,

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