Glassware are often used during the experiment, so accidents are common, so it is very important to know the properties of the glass before using glassware.
Hardness ———– hardness is 6~7, brittle, cracks are shell-like like sharp tools.
Strength ———– Strong resistance to pressure but weak tensile strength , easy to break.
Heat resistance ——– poor thermal conductivity, it is easy to break when with local application of temperature difference as its brittle nature.It can not heat the thick wall of glass.
1. Wear protective gloves when cutting or processing glass tubes and glass rods.
2. the cross section of the glass tube and the glass rod should be smashed with a trowel or melted with a blowtorch to make the section smooth and not easy to cause cuts.
3. When the rubber tube and the glass tube are connected or the thermometer is inserted into the rubber stopper, it is easy to break the glass tube or the thermometer and cause injury. Therefore, apply water, glycerin, grease, etc., and insert it while rotating. If it feels too tight, use sickle and other tools to expand the hole and then insert.
4. When washing the beaker and flask, there is often an accident that cuts the hand, so do not use force or impact when washing.
5. Do not use excessive force when assembling experimental glassware such as flasks.
6.Avoid sudden heat, quenching, local heating when heating and cooling.
7. Glass bottles and measuring cylinders are with thick wall thickness, due to glass’s poor thermal conductivity, the heat of solution generated in the preparation of the solution will damage the container, so can not prepare solutions in glass bottles and measuring cylinders.
8. Under normal circumstances, it is not allowed to heat the closed glass container.
9. Glass containers with thin wall thickness are specially worn when placed on the table or when they are stirred.
10. When the pressure or vacuum is applied, the thin and flat glass container is fragile and cannot be used.
11. When assembling the experimental device, it should be noted that the tightening of the clamp will damage the glass container.
12.The heated glass is difficult to judge the degree of heat when the glass is been processing, so be careful not to touch with your hands to avoid burns.
13. when holding a glass tube (rod) longer than 50cm, take it vertically.
14. Discard the glass fragments and throw them in the designated trash can.
15.glass processing needs to be carried out in the prescribed place.
16. To fully confirm the presence or absence of deformation, cracks.
17. Even if very careful, sometimes the glassware will still be damaged, so take appropriate safety precautions to minimize the risk.
18.when using a heavier glass instrument, use both hands.
