The most common use of a triangular file in a chemistry laboratory is to score (scratch) and weaken small diameter glass tubing prior to breaking it. This makes the glass a) easier to break and b) more likely to break cleanly where the score is instead of randomly, leaving jagged edges. Pressure is applied on the OPPOSITE side of the score; remember to protect your hands with heavy gloves and/or a thick cloth.
Large diameter tubing requires different methods; the "score and snap" technique tends not to work so well.
Scoring glass tubing at the place it is desired to break at.
A file that is triangular in cross-section.
You can use all types of patterns, such as swirls or triangular patterns
Refractors use a concave lens to refract the light rays through the main body, off the rectangular prism and into the eyepiece. These telescopes use no mirrors like reflectors (except the triangular prism contains a small mirror but a triangular prism is optional)
triangular prism
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A file that is triangular in cross-section.
The boat had triangular sails.
trims and sharpens edges of glass, such as glass tubes
Atriangular file is a hand tool used for removing material from the surface of a job. It has a triangular cross section. The cross sectional area and length are designed to the ISO standard. Like other types of files triangular files can have various tooth cuts, smooth, medium and hard.
The boat was small and had two triangular sails.
A triangular file is often used to stir chemicals, as well as to scratch glass tubing before breaking it.
Most commonly it's used to score small diameter glass tubing before breaking it so that it will break cleanly instead of shattering. Don't attempt to saw through the tubing with the file. If it won't break cleanly with a light score, you'll need to use a different technique such as scribing followed by thermal shock.
Active file: An active file is where you use a file quite frequently. Inactive file: A file that you use but not as frequently. Dead file: A dead file is where you don't use the file at all and is stored in your archives
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Most commonly it's used to score small diameter glass tubing before breaking it so that it will break cleanly instead of shattering. Don't attempt to saw through the tubing with the file. If it won't break cleanly with a light score, you'll need to use a different technique such as scribing followed by thermal shock.
triangular prism