It does not take so long to anneal glass in a lehr as in a kiln, and therefore in many factories only lehrs are used.
Now it is very difficult to anneal glass, the trouble being that all hollow ware is one temperature on the inside and another on the outside.
A small oven upon the plan of a baker's, is best fitted for this purpose, which being heated to dull redness, and then extinguished, is ready to soften and afterwards anneal the conchoidal pieces.
When the colours are properly burnt in, the fire is suffered to die away, so as to anneal the glass.
Malleable or wrought iron, if subjected to pressure, becomes brittle, and it is necessary to anneal it.
To anneal steel it must be heated to a bright cherry red and then gradually cooled down.
Flange one end of this tube a little, and anneal the flange well in the smoky flame.
Anneal with great care, and cool in such a position that the acid cannot reach the hot glass.
Reheat the whole of the end of the tube nearly to the softening temperature, anneal it a little, and allow to cool a few seconds until well set.
The whole of the end of the tube is now cautiously reheated and then cooled slowly to anneal it.
The Venetians had a separate furnace to anneal their glass, supported by independent fires, as used at the present day.
This is probably accounted for by the heating action on used rings which tends to anneal the metal as well as making it less springy.
This book tells how to select, and how to work, temper, harden, and anneal steel for everything on earth.
It is quite necessary to annealall those parts of the pump that are to be exposed to heat, otherwise they soon crack.
The glass portions of the pump I have contrived to anneal completely by the simple means mentioned below.
When the knife is finished, so far as the forging is concerned, anneal it by heating the whole blade and allowing it to cool in slaked lime.
That is why brass hardens so quickly under hammering, making it necessary to anneal the metal very often in order to work it.
Anneal and repeat until the sides are at right angles to the base.
Anneal whenever the metal seems springy and keep working until the stem is tapered about 3/4 in.
If the metal should feel springy before driving it up close, anneal it.
Even a small wood fire would give you heat enough to anneal any size pieces you wish.
Anneal the metal and repeat the hammering, beginning at the same place and working up to the same place as before.
Before this is done it may be necessary to anneal the metal two or three times.
When this silver becomes hardened anneal it, but just enough to allow you to shape it up.
Let it cool off gradually, and when necessary anneal or soften it.
Not only does spinning stretch the metal, but it hardens it as well; therefore, at the stage C it becomes necessary to anneal the partially completed reflector, which is done by heating it to a low red in a gas furnace.
It was necessary to anneal these shells between each operation, the upper shell being annealed four times and the lower one three times.
There are furnaces that anneal without scaling by excluding the air when heating, but they are not in general use.
Anneal it properly by heating and plunging in water.
Where it is impossible to wait so long as the foregoing method takes, then a cold water anneal may be used with less time.
Rivet them together, and anneal the whole piece by placing it in a fire and heating the metal to a cherry red, then allowing it to cool in the ashes.
When this stage is reachedanneal the work carefully and see that the glass is not too thin.
For very deep curves no doubt it will be better to make an intermediate pair of dies and to re-anneal the aluminium after the first striking.
On the whole, it is best to heat each end separately till the glass thickens a little, anneal in the flame and in asbestos, and then proceed as in ยง 22.
In the case of cast iron and sometimes with copper it is necessary to anneal after welding, since otherwise the welded pieces will be very brittle on account of the chilling.
The mould should be allowed to remain in place as long as possible, preferably over night, so as to anneal the steel in the weld, but in no case should it be disturbed for several hours after pouring.
The above list will hopefully give you a few useful examples demonstrating the appropriate usage of "anneal" in a variety of sentences. We hope that you will now be able to make sentences using this word. Other words: callous; firm; harden; petrify; steel; strengthen; temper; toughen
