These products may be made from muscovite or phlogopite mica with a suitable bonding medium.

The binder may be totally driven off in service, giving a material which needs to be supported, or may remain totally or partially, giving a self-supporting material; in this case, the binder shall have the necessary resistance to the operating temperature.

The products may be supplied in sheets, strips or flat pieces.

The minimum nominal thickness is 0.30 mm (mica splittings) and 0.20 mm (mica paper).

NOTE: The International Standard corresponding to this Standard and the symbol of degree of correspondence are as follows.

IEC 60371-3-3: 1983 Specification for insulating materials based on mica.

Part 3: Specifications for individual materials.

Sheet 3 : Rigid mica materials for heating equipment (MOD)

In addition, symbols which denote the degree of correspondence in the contents between the relevant International Standard and JIS are IDT (identical), MOD (modified), and NEQ (not equivalent) according to ISO/IEC Guide 21-1.

NOTE: The International Standard corresponding to this Standard and the symbol of degree of correspondence are as follows:

IEC 60455-2-2:1984 Specification for solvent less polymer sable resinous compounds used for electrical insulation-Part 2: Methods of test-Test methods for coating powders for electrical purposes (MOD)

The symbols which denote the degree of correspondence in the contents between he relevant International Standard and JIS are IDT (identical), MOD (modified), and NEQ (not equivalent) according to ISO/IEC Guide 21-1

In this Standard, where test requirements are given for both method A and method B in parallel, either of the methods shall be selected to be applied.

NOTE: The International Standard corresponding to this Standard and the symbol of degree of correspondence are as follows.

IEC 60371-2 :2004 Specification for insulating materials based on mica-Part 2: Methods of test (MOD)

The symbols which denote the degree of correspondence in the contents between the relevant International Standard and JIS are IDT (identical), MOD (modified), and NEQ (not equivalent) according to ISO/IEC Guide 21-1.