A Justmantles Tutorial - How to fit a Mantle

Welcome to a short tutorial on how to fit a mantle on your lantern

Mantles must be replaced whenever a hole or split forms, the mantle is very brittle once burnt in so the smallest bump can cause them to break. Check your mantle after transporting your lantern and every time before lighting. You must replace a mantle with holes as these can eject a jet of very hot flame and melt or crack a lamp glass very, very quickly.

First of all, a quick note on safety, be careful when handling mantles, especially when removing old ones, as they may contain thorium which is a slightly radioactive element. Studies have proven that there is little danger in handling thorium unless it is ingested (swallowed) so be very careful not to breathe in the fine dust that can form when you are removing them. The Peerless mantles that we supply are not radioactive, but contain an non radioactive element called yttrium, this can still be harmful if swallowed so do please be careful and, if necessary, wear a dust mask when changing mantles.

First, you will need your lantern (the one shown is a Coleman model 201 Kerosene, very similar to the very common 200 model), your new pack of mantles (in this case the 2C-HG although the 24A will also work) a pair of scissors and some matches.

 



Remove the bail, vent and lantern glass

Remove the mantle, being careful to remove the string in the groove of the burner. Carefully brush away all the remains of the mantle, avoid breathing in any of the dust.

Select a new mantle, hold it as shown, inserting a finger in the 'sock' and drawing the two strings out.

Initiate a square or 'reef' knot by putting the right-hand string over the left and then tucking it under.

Fit the mantle over the burner and pull it tight.
Make sure the mantle is distributed evenly around the burner - this is very important.

Complete the second half of the knot by putting the string in your left hand over the right-hand string and then tucking it under.

Tighten the knot, again making sure all the folds in the mantle are distributed evenly around the burner.

Cut the tails of the string back, using a pair of scissors, so there is only about 5mm either side of the knot.
This is important as any excess may cause a premature hole in the mantle.

Light a match and apply it to the bottom of the mantle.

Make sure the whole mantle burns evenly.

 

This is what the mantle will be like once it has been properly burnt in, don't worry about its appearance, it will shrink further and 'fill out' once you light the lantern.

After the mantle has completely burnt in and has been allowed to cool for a minute, replace the glass, vent and bail and light your lantern according to the manufacturers specifications.
Make sure the lantern or lamp is running at full pressure to ensure that the mantle forms correctly as in the picture. It should take the shape similar to shown - almost like a lightbulb!
Run the lantern for at least 20 minutes on your first lighting after replacement, this will ensure that the mantle is as strong and as durable as possible.