cupel sentence in Hindi
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- It was carried out in small shallow recipients known as cupels.
- Cupel sizes depend on the amount of material to be assayed.
- The scorifier is removed and the metal transferred to the cupel.
- The primary tool for small scale cupellation was the cupel.
- The cupel should be heated at the same time.
- Cupels were manufactured in a very careful way.
- A shallow depression in the centre of the cupel was made with a rounded pestle.
- Moulds were made out of brass with no bottoms so that the cupels could be taken off.
- The correct method of preparation of the cupels is covered in detail with beech ashes being preferred.
- Lead was melted in a bone ash'test'or'cupel'and air blown across the surface.
- Ashes have to be ground into a fine and homogeneous powder and mixed with some sticky substance to mould the cupels.
- After the litharge has been absorbed by the cupel, buttons of silver were formed and settled in the middle of the cupel.
- After the litharge has been absorbed by the cupel, buttons of silver were formed and settled in the middle of the cupel.
- Cupels and scorifiers were mass-produced as after each reduction the vessels would have absorbed all of the lead and become fully saturated.
- The cupel is placed in the furnace and copper is separated into the lead which forms lithage in the cupel leaving the noble metal.
- The cupel is placed in the furnace and copper is separated into the lead which forms lithage in the cupel leaving the noble metal.
- Alternatively the ore can be smelted in a triangular crucible, and then have lead mixed with it when it is added to the cupel.
- Another vessel used for the same process is a scorifier which is similar to a cupel but slightly larger and removes the lead and leaves the noble metals behind.
- One of the earliest written references to cupels is " Theophilus Divers Ars " in the 12th century AD . The process then changed little until the 16th century.
- The refining of methods during the Medieval and Post Medieval periods led to the invention of the cupel which resembles a small egg cup, made of ceramic or bone ash which was used to separate base metals from noble metals.
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