The production process of polarizing microscope light film
When observing with a polarizing microscope, the sample should be made into a qualified polishing plate or polishing plate, abbreviated as a light plate. The production process is as follows:
(1) Sample selection: Select representative sample parts based on observation purposes and analysis requirements, cut them into 10 × 10 × 10mm sample blocks, and clean them thoroughly.
(2) Embedding or gluing: For some smaller samples, inlaying is required; Samples with high porosity or porosity should be impregnated with glue first.
(3) Rough grinding: Select the relatively flat side of the sample, place it on a grinding machine, and use coarse sand to grind the surface flat, tidy up the appearance, and remove edges and corners.
(4) Fine grinding: Grind with fine sand until all traces left by coarse grinding are removed.
(5) Fine grinding: Use finer sand to grind until the surface is flat, and place it in a bright place to observe the faint reflection.
(6) Polishing: Place the sample on a polishing machine and add grinding paste (polishing powder) for polishing until the surface of the sample is bright and there are no obvious scratches observed under a reflective microscope.
(7) Marking: The ground sample should be numbered, labeled, and the source and name should be clearly stated.
(8) Erosion: Select appropriate erosion methods and conditions based on observation purposes and analysis requirements, and erode the sample.
When conducting microstructure analysis under both transmitted and reflected light, the sample should be made into a thin film, even a super thin film (<0.02mm). When preparing a thin film, first grind the sample into a thin film with a thickness of 0.03mm without adding a cover glass, and then polish the surface of the finely ground thin film on a polishing machine.
