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Mica sheets are almost unprocessed form of the natural mica. They are simply sheets of mica extracted from the mine, cleaned and sorted by size and quality. Mica sheets in the trade are in a form of irregularly shaped sheets with different thicknesses and different qualities.
Mica sheets, also called block mica, are natural mica sheets of irregular shape and thickness from 0.18 to 16.00 mm. Mica occurs very commonly in sheets of area size from 6 to 90 cm2. Larger sizes are very rare (and thus - very expensive).
Mica sheet has been classified according to various criteria such as the size of the plates, thickness, purity or transparency mica. The classification rules are described here.
With plates of mica are made shields, windows, disk, and various other elements of electricity or thermal insulation. Residue remaining after the mica block selecting is waste - scrap of mica, used as a raw material for the production of flakes, powders (grounded mica), pigments and other insulating materials based on mica (micanite).
Mica sheets are available in a wide range of size (see here). Mica plates are also available in customized sizes, cut according to specifications required by our clients. We employ a team of highly skilled technicians who manually grade and cut the mica blocks to ensure zero-defects in the finished product.
Quality class of natural mica define its transparency, limit the amount and type of pollutants. Smaller amount of impurities and discoloration, the higher value (and price) of the mica sheet. In accordance with the standards proposed by ASTM (American Society for Testing and Material) and stored in the form of a Standard D 351 Classification for Natural Muscovite Block Mica and Thins Based on Visual Quality distinguished grade from V1 (highest) to V10 (the lowest). Mica with quality class V1 is often called as collectable mica (see below). Mica quality standards are discussed here.
Sizes od mica sheets have also been standardized. Distinguished by the size of the category OOEE Special (highest) to No. 6 (smallest). Classification of the size of the mica blocks is discussed here. When increasing the size of the mica sheet (higher category), is also growing its unit price.
Collectable mica (top quality)
Highest quality mica (class V1) is called the collectable mica. It is the most expensive, but almost devoid of blemishes (occlusion), discoloration and contamination. It is often purchased by research institutes and laboratories.
The picture on the right shows the comparison of mica V1 and V8.
Rules for the sale mica blocks
Mica blocks are usually sold in situations where standard shapes of natural mica ie. shields, windows, discs do not meet the requirements of customers in terms of size, quality or thickness. In this case, we search for the smallest sheet of mica, which includes the required size of the plate and meets the other requirements of the order.
We usually offer mica plates with a thickness from 0.1 mm - up to 1.5 mm and dimensions in the category from No. 2 to No. 6 in all classes (including collectable mica Class V1).