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Home / How to Draw Glass Cracks on a Human Body

How to Draw Glass Cracks on a Human Body

Glass tubing and rod come in four (4) foot lengths and metric diameters. Four anxiety of tubing is rather bad-mannered to handle in the flame so we need to cutting information technology down to a manageable size. Select a piece of ten mm OD tubing and identify it on a apartment surface. Mark the glass into 16 inch lengths.

The kickoff ii methods listed hither work well for smaller diameter rod and tubing. For larger diameters consider methods 3 and 4 volition nigh certainly be required.

Selection #1 - Scratch On The Demote Then Snap

This method works well for beginners, just as you gain feel you will probably end up preferring Pick #ii (which is quite similar).

  1. Create a scratch on the drinking glass wall surface by drawing the corner of a file or, ideally, a tungsten carbide knife perpendicularly across the tube. as shown beneath:
    Tip: Do this step one time creating a scratch approximately one/8 inch long. Do not saw the glass. Sawing the glass will not make the process of breaking the drinking glass any easier. It is not necessary to make a long scratch. A brusk, single precipitous scratch is more than probable to produce a clean and even edge.

  2. Pick up the drinking glass tube and wet (water, saliva) the scratch with your finger. Turn the scratch away from your body.
  3. Place your thumbs on the glass tube. The scratch should be located between the thumbs but on the opposite side of the tube as shown below. With practice you will detect a distance between your thumbs that works for you.
  4. Button your thumbs away from you. The drinking glass tube should break cleanly at the scratch. Prophylactic Note : Y'all may wish to wear work (not latex!) gloves or wrap the glass in a towel to reduce the possibility of cutting yourself.

A tutorial for this method with step-by-stride pictures is bachelor at Robert Hunt's Teralab spider web site.

Option #2 - Scratch While Belongings Then Snap

  1. Concur the glass tubing one hand.
  2. Hold your tungsten carbide knife in a vertical position with other hand. Place the glass tubing between your thumb and knife, holding it firmly - horizontal and close to your body for back up and stability.
  3. Twist the hand with pocketknife, creating your scratch.
  4. Break the tubing as described in Option #1, Step 4 (above).

Option #3 - Scratch and Apply Hot Glass

This option is the safest and easiest method if you have large bore tubing just don't have a glass saw. It is likewise useful when repairing vacuum lines or apparatus, particularly those that are fixed in position. This method should be tried after y'all have had some experience treatment the torch:

  1. Scratch the tubing with a file or carbide knife as described in Options #1 and #2 (above).
  2. Every bit above, wet the scratch.
  3. Oestrus the end of a 6 mm rod until information technology is red hot. Quickly identify the end of the hot rod onto the wet scratch. Be certain the scratch line extends beyond the contact expanse of the hot rod.
Tip: If done correctly, you will observe a cleft forming at and extending from the scratch. If the crack does not travel completely around the circumference tap the fissure lightly. This action may chase the crack effectually the tube. Alternatively, reheat the drinking glass rod and reapply to the cleft. Again, exist certain the rod does not extend beyond the end of the crack.

Pick #4 - Power Tools

If you take access to a drinking glass saw or cut-off wheel, yous may observe this to be an easier method. For minor and routine work this is serious overkill.

Pick #v - Hot Wire Cutter

This method is non for beginners. It uses a loop of nichrome wire which is resistively heated past a power supply. The wire is wrapped around the tubing and and then instantly brought to ruddy hot. Information technology tin can be used to cut very large diameter tubing in place (such equally on a large vacuum manifold) or to cut very accurate brusque lengths of glass. Robert Hunt has a full clarification of hot wire cutting on his Teralab web site.

Tutorial Lesson half-dozen, Cutting Glass
Lesson 5
(Burners and Torches) 		Lesson seven
(Rotating Glass)

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