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Mica is a cheap and durable material, used in many constructions such as picture frames, countertops or as an alternative to glass. Mica is light, inexpensive, and quite durable because it doesn’t rot or break. You can also easily cut mica into different shapes with the right tools, taking precautions and taking precise measurements. With thin plexiglass, you can slit and break with a multi-purpose knife or slitting knife. With thicker sheets, you’ll have to cut with a band saw to cut straight lines or a hacksaw to cut into other shapes.
Steps
Slitting and breaking thin mica
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Place the mica plate on the work surface raft. For mica sheets with a thickness of 0.5 cm or less, the slitting and breaking method is the easiest. Place the mica on a table or work surface so you can measure and cut on a stable surface. [1] X Research Source
- Make sure the countertop is clean and free of any objects that could interfere with the operation or leave stains and damage the mica.
- Choose a structure that is firm and balanced, not wobbly.
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Draw a line with a marker pen at the position you want to cut. Place the mica on the tabletop and use a ruler to draw a straight line where you want to cut the mica. Draw a conspicuous line and be careful not to smudge. [2] X Research Source
- Use a marker to write on the board so you can erase the line after you cut the mica.
Tip: If you make a mistake when drawing a line, erase the line and draw it again. Use a wet rag or paper towel to wipe.
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Use a multi-purpose knife to cut along the line just drawn on the mica sheet. Make sure to place the mica flat and steady on the tabletop. Press the knife firmly and use the ruler to make an incision along the line just drawn. Make an incision on the line about 10 -12 times until a deep groove is formed on the mica surface. [3] X Research Sources
- You can also use a slit knife if the blade is sharp enough to cut the mica.
- The deeper the incision you make, the easier it is to break afterwards.
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Flip the mica over and slit the other side. After you have made a deep slit in one side of the mica, you will turn the other side up and cut along the line you just cut on the first side. Make an incision in the surface of the mica sheet until another deep groove is formed on this side. [4] X Research Sources
- Be careful when handling the mica to avoid warping or warping before you’re ready to break it.
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Place the mica on the table so that the part you want to cut sticks out from the edge of the table. Once you’ve made the incision, move the mica to a position where it’s easier to break. Position the mica so that the part you plan to break sticks out from the edge of the table. [5] X Research Sources
- Make sure that all the mica you want to cut is sticking out of the work surface.
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Clip the mica plate to fix it on the table top. Use a spring clamp or a C-clamp to clamp the part of the mica that you don’t plan to cut away. Firmly clamp the mica to the work surface so that the mica does not move. [6] X Research Sources
- Do not clamp so tightly that a dent in the mica is formed.
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Break off the mica to be cut. After you have clamped the mica plate firmly on the tabletop, press down quickly to break the piece of mica to be cut. The mica will come apart neatly along the line you’ve cut in it. [7] X Research Sources
- You can use one hand to hold the mica, the other hand to press down to break the mica.
- If the mica does not break off completely along the incision line, you can use a multi-purpose knife to cut along the groove and break the mica.
Cut straight lines with a circular saw
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Use a circular saw to cut metal with teeth fitted with carbide alloys. Make sure the teeth of the saw blade are evenly spaced, the same size and shape to cut evenly. The carbide-tipped toothed saw blade designed for metal cutting is strong enough to cut mica sheet without letting dust or debris into the air.
- Saw blades with fewer teeth will help limit the amount of dust or debris when cutting mica.
- You can find saw blades specifically designed for mica cutting.
Warning: Small particles of mica can cause eye damage. Please wear safety glasses when cutting mica.
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Place the mica sheet on the saw table and mark the position you want to cut. Place the mica sheet on the saw table so you can cut through the mica while it remains flat and fixed. Use a ruler or a straight edge to draw a straight line on the mica. This line will be the cut, so you need to make it straight and clear. [8] X Research Sources
- Use a marker to write the board so you can erase it easily if adjustments are needed.
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Set the saw guide line to coincide with the line just drawn. The circular saw has an opening that allows you to see where the blade is located. Place this guide line with the line you just drew on the mica.
- Make sure the plexiglass is held in place and does not shake or move.
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Leave the saw to the highest speed before cutting. The saw blade will have to rotate at full speed before contacting the mica plate to produce a smooth and even cut. Turn on the saw and let the saw rotate to full speed.
- If you cut the mica before the saw reaches full speed, you can cause the saw teeth to get caught in the mica and create jagged or jagged cuts.
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Push the saw blade slowly and smoothly through the mica plate. Align with the guide and straight line to saw mica. Push the saw at an even speed to prevent the saw blade from jamming. [9] X Research Source
- If the saw stumbles or jams, you are probably pushing too fast. Stop pushing to allow the saw blade to regain speed, then continue pushing the saw blade through the mica.
- Make sure both halves are level on the saw table so that it does not fall to the ground when the mica has been cut.
Use a hacksaw to cut different shapes
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Use a hacksaw to make a circular cut on the mica. The chainsaw looks quite similar to the circular saw, but is shorter and moves in an up and down direction. You can use a hacksaw to make both straight and circular cuts, so it’s a good choice if you need to cut mica into certain shapes or a round piece of mica. [10] X Research Source https://www.mymydiy.com/how-to-cut-plexiglass/
- Use a saw blade without coating and small teeth to cut mica.
- Keep a few blades handy in case they need to be changed while cutting.
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Place the mica sheet on the saw table. Use the saw table as a work surface to hold the mica sheet while cutting. Place the mica so that it is stable and fixed on the saw table. [11] X Research Source
- Check that the plexiglass is not slipping or shaking before cutting.
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Use a marker to write the guide line for the saw. It is extremely important when working with a hacksaw to have a guide line, especially when you want to cut circles or cut special shapes. The hacksaw allows you to cut a specific shape, but you need to have clear guides. Use a marker to draw the shape you want to cut. [12] X Research Source
- The marker pen will make it easy to erase when you’ve finished cutting or when you need to change the drawing.
Tip: If you’re going to cut a pattern or shape, you can use a die or a round object to draw even lines.
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Wear goggles to protect eyes. Splinters or tiny particles will fly into the air when you’re sawing mica and can cause eye damage if caught in the eye. Be sure to put on your safety glasses before you start sawing.
- Make sure your glasses fit snugly on your head lest they fall while you work!
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Drill an opening to insert the saw blade into the mica sheet. The hacksaw needs an opening to get in, so the first thing to do is drill an opening with a drill and wall drill that’s wide enough for the saw blade to get in. If you plan to saw a twist or turn, drill in the smallest corners of the figure. This will make it easier for the saw blade to turn when reaching these sections. [13] X Research Source
- The saw blade may be bent or broken if it cannot be turned easily.
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Insert the saw blade into the opening and turn on the highest speed. Insert the saw blade into the hole drilled in the mica plate and turn on the saw. The saw blade moves slower than a circular or circular saw, so you need to let it run at full speed before you start cutting. [14] X Research Source
- If the saw blade has not reached full speed when it comes into contact with the mica plate, it may become entangled and bent or break and damage the saw.
- The saw blade can get caught and injure you, so be careful.
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Push the saw slowly to cut through the mica. Apply even pressure so that the saw blade does not slide out of the mica plate. Saw closely to the guide line and slow down when approaching turns. If you hear or feel the saw blade stand or entangle, slow down and back away, then speed up again and continue pushing the saw blade all the way through the mica. [15] X Research Source
Things you need
Slitting and breaking the thin sheet of mica
- Blackboard marker
- Ruler or straight edge
Cut a straight line with a circular saw
- Blackboard marker
- Ruler or straight edge
- Circular Saw
- Goggles
- Carbide-mounted saw blade
Use a hacksaw to cut different shapes
- Blackboard marker
- Ruler or straight edge
- Jigsaw
- Goggles
- Uncoated saw blade with small teeth
- Power drill
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This article is co-authored by a team of editors and trained researchers who confirm the accuracy and completeness of the article.
The wikiHow Content Management team carefully monitors the work of editors to ensure that every article is up to a high standard of quality.
This article has been viewed 1,081 times.
Mica is a cheap and durable material, used in many constructions such as picture frames, countertops or as an alternative to glass. Mica is light, inexpensive, and quite durable because it doesn’t rot or break. You can also easily cut mica into different shapes with the right tools, taking precautions, and taking precise measurements. With thin plexiglass, you can slit and break with a multi-purpose knife or slitting knife. With thicker sheets, you’ll have to cut with a band saw to cut straight lines or a hacksaw to cut into other shapes.
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