Best combination for making pyrometric cone

For anyone who wants to know what the mixture of cones is? The answer is clay, quartz, alkalis and various metal oxides. Grind and mix according to the ratio or formula that has been tested until the result is certain. Compressed into a cone-like pyramid with a triangular base, length 17 mm, height 60 mm, height 31 mm. It is only used in the laboratory measuring temperature by looking at the bend of the cones. Currently, Pyrometric Cones that are commonly used in all ceramic industries can be divided into 4 types which are

1. Small Pyrometric Cones > Small cones, commonly used in electric kilns, they must be used with refractory rods to form a kit called Kiln Sitter inside and outside of the kiln
2. Large Pyrometric Cones > Large Pyrometric cones are commonly used to measure temperature in general ceramic gas kilns but they cannot be placed by themselves. They must be placed on a ceramic plate with a slot by placing on the heating wire
3. Self Supporting Cones > Large Pyrometric Cones are commonly used to measure temperature in general ceramic gas kilns.
4. Pyrometric Bars > Small cones, while being used, must be supported by fireproof rods assembled into a kit called the Kiln Sitter inside and outside of the kiln same as using Small Pyrometric Cones.